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renesis
· posted in Planted Aquarium Discussion
Hey guys, needing some expert insight on my 90P build regarding the Yugang reactor. I’d like a sanity check on sizing.

System
  • Display: 90 × 45 cm outside, 10 mm glass, so ~88 × 43 cm inside (~3,780 cm²), rimless, lidless.
  • Sump: 20-gallon long (76 × 30 cm, ~2,280 cm²), 3 chambers, loose lid.
  • About 220 L total water.
  • Return enters below the surface; no deliberate surface agitation.
  • BeanAnimal overflow, with the main draining underwater (no cascade).
  • Currently cycling on tap water: KH 13, GH 12. The plan is RO remineralised to KH 3–4.
Reactor
  • Horizontal Yugang, 3" Sch40 PVC (ID 77.9 mm), 46 cm long.
  • Outlet rotated to near the limit of what my plumbing allows, so the pocket is much smaller than half-full.
  • CO₂ flow meter at about 9 mL/min. That’s slightly over what it dissolves, so it gives small occasional burps.

What I measured
  • Plateau: pH 6.80 at KH 13 ~ 60 ppm (pH/KH estimate). Degassed baseline pH at 8.2.
  • Overnight decay after CO₂ off: k ≈ 0.12/h (half-life ~5.7 h). That implies a CO₂ exchange rate of ~4–7 cm/h, i.e. a calm surface.
  • Working the 1/17.7 rule backwards from my reactor area (~180–358 cm² depending on rotation), my effective loss area is ~1,100–2,200 cm², against ~6,060 cm² of real water surface (display + sump).
Am I just way off on my surface agitation? I have mild ripples, but nothing overly agitating, but even without taking the sump into account, I should be seeing way more loss right? I'm planning on keeping neocaridina, so aiming for a 30-40ppm max, but even on my min setting I see ~55-60 ppm.

y1.webp

View attachment y2.mp4
0 Replies · 8 views
JayP
Supporting I Donated 2026 Rockstar
Last reply · posted in Journals
I thought I would go ahead and get an early start on the journal for my next build. Still some prep work to complete but I was able to sneak some time in this evening to do some leak testing.

No need for a ton of media on this tank so I'll be using the "Temu" filters I recently talked about; one is a full foam prefilter and the other is part foam, part matrix. I failed to mention, when I posted my initial unboxing of the temu filters, that they do come in 2 sizes for each configuration, a 200 series, and the slightly larger 240 series. I think using the smaller 200 as the prefilter will work well in this setup. I was really surprised to see how much the foam expanded once it got wet. I may actually remove the top portion of foam in the filter with the matrix. Also, I confirmed the Netlea valves do work on the Temu filters.

I'm going with the MDP-2500 pump which may seem overkill for a 22g tank, but since it's 90cm in length, I want to make sure I have good flow end-to-end, and the 1500 pump I tried wasn't giving me quite what I wanted. I still also have to go through an inline heater as well, with several elbow fittings mixed in. I'll be able to adjust this pump down to just what I want. I'm also using the 3D printed barbs I modeled with the pump. I initially had issues with my elbow fittings leaking just as @renesis did on their high tech build. After seeing renesis's fix of coating the elbow with epoxy, I was about to try the same but realized I had a small can of spray-on Flex Seal so thought I'd give that a try. So far, it seems to be working fine on the elbow fitting. I do have a small leak on the output straight fitting but I think that's a different issue.

Otherwise, no other leaks which surprised me as I was expecting some on my DIY CO2 reactor which is a bit different design than my previous builds. It's working great and I want to give a shoutout to @Yugang for the idea of simply using some teflon sealing tape to seal the PVC caps to the Acrylic tube. You don't even need many wraps. I made the mistake of using too much on one end and when I tried to take it back off, it was quite a struggle, almost as if I had glued it, so trust me, as long as your cap I.D. matches your pipe O.D., a few wraps should do the trick.

More to come.


2 Replies · 76 views
Art
Art
Staff member I Donated 2026 Founding Member
· posted in Meet & Greet Forum
Welcome to ScapeCrunch, @kneeshg!
We would love to get to know you. Please tell us about yourself. What tank do you have?
0 Replies · 7 views
Phish Tank
Supporting
Last reply · posted in Shrimp and Other Invertebrates
I'm looking for recommendations for neocaridina retailers. I'd like to order them at the end of October, and have them shipped to Asheville NC.

Any recommendations?
16 Replies · 971 views
Art
Art
Staff member I Donated 2026 Founding Member
· posted in Meet & Greet Forum

Hello  Welcome, Ilja

Welcome to ScapeCrunch, @Ilja!
We would love to get to know you. Please tell us about yourself. What tank do you have?
0 Replies · 11 views
BenB
Rockstar
Last reply · posted in Planted Aquarium Discussion
These plants have been sitting in this container in the dark for 9 days. They are still wet, but the container isn't 100% air tight.
Plants look great. They are crispy and green. I removed them from the tank on Oct 11. It's Oct 20.
I haven't had a chance to do hardly any tank maintenance since my trip, but I needed to get some stuff out to make room for some tc plants I ordered.
I thought someone might want some of this, so I put it in this container, and was going to offer it all up if I thought I'd have time to ship. (Too late now)
I can't believe how long they've lasted.
So if you need a way to store some plants for a few days. This might be an option.
Note: Both things were pulled up roots and all. If I had cut stems, they might not have lasted?

20261020_083415a.webp
2 Replies · 51 views
JayP
Supporting I Donated 2026 Rockstar
Last reply · posted in Planted Aquarium Discussion
Browsed the Sreepadma booth at Aquashella briefly today. I'd not heard of them but they are the largest aquatic plant farm in India and have been selling their TC offerings in the US for about 2 years. I was actually impressed with the qualty I was seeing of their TC cups and wish I had room in a tank for some (and some ADA TC). Has anyone else purchased any of their plants. One of the first that I spotted was Red Tiger Crypt which was a coincidence since we have a thread discussing it.
17 Replies · 741 views
renesis
Last reply · posted in Journals
Hi guys!

I'm new here, but not entirely new to planted tanks though I've been out of the hobby for the better part of the last decade between kids and moving a couple of times - but finally in a spot where I can do something again. I'm mostly going to be making things up as I go along, but plan on a lot of automation (I want to integrate everything into home assistant) and a lot of DIY as I love the challenge of building things out myself.

The starting point:

I picked up a 90P rimless, low-iron tank on a great deal.

Media (1).webp

I have a rough idea in my head for a stand to be built from plywood - just have a couple other house projects to finish off before starting that built.

Wife says I can only have one aquarium, so for this tank, I want to go all out with a sump to allow for auto top off, and auto water changes, auto fertilizer dosing etc. etc. I have half a plan in my mind.

I've also started on the light fixture which I've modeled up in CAD, and plan on making out of an 8020 extrusion, and some 3D printed bits.
Screenshot 2026-06-01 092809.webp
I'm using bridgelux gen 3 thrive CW (3000k) and WW (5000k) LED strips which have super high CRI at 98+ along with some specific XPE2 wavelengths that I'll solder onto some starboards. Far Red (730nm), Red (654nm), Cyan (495nm), Blue (455nm), Visible UV (415nm). Each segment of the white channels will be on its own driver so I can adjust left to right brightness in thirds, and each colour channel on its own driver so I can vary each channel on a time-based approach.

These will be run from a custom PCB board with Meanwell N-LDD drivers, and will run ESPHome on an ESP32 so it can link up with my Home Assistant installation.
1780321317096.webp

That's it for now, this will probably be a very slow build so be warned if you follow along!
87 Replies · 6213 views
Gwad
Last reply · posted in Lounge
I completed my first AGA contest photos for the Dutch category today!

What a PITA!!! 😜 It took me a lot longer than I thought it would. Removing the tank equipment, cleaning the resulting mess, figuring out how to use a bunch of random cardboard to keep the light bleed off the camera...it was like a 4.5 hour affair for me in my cramped, sweaty office.

20260920_153710~2.webp

The other challenge was keeping the water clear with the filters off. Every time I thought I was ready to shoot I'd find one more leaf or stray piece of root hanging out somewhere on the surface or stuck in the moss or something. It's a lot more noticeable when the water is stagnant.

I'm glad to be done. I'm about 75% happy with how my tank turned out. Had a couple issues with plant selections but I think I made it work OK for my first entry. I'm really excited to see everyone else's tanks (and to finally start seeing them discussed on the forums). Good luck everyone!
9 Replies · 413 views
JacksonL
I Donated 2026
Last reply · posted in Equipment Discussions
I wanted to share my experience so far with a cheap flow meter from Aliexpress.
I am generally a “you get what you pay for” aquarist, but I have taken a gamble due to circumstances. It is still early days, but it feels like it may have paid off.
Looking to add a flow meter to help tune my CO2 in a newly set up 130L tank, I searched far and wide for the different options. They were few and far between, most were for far larger flows than I needed and those that were appropriate were ridiculously expensive to get to Australia. So I went searching on the various Chinese discount sites and came across the LZB-3WB flow meters. They are cheap… real cheap. Less than $30 Australian landed, which made me nervous, but felt it was worth a shot at that price.
Not knowing what flow ranges I would need I ordered a 6-60ml/minute model.
After installing it, it was clearly too high of a range for my tank, but it did allow for some visibility while adjusting CO2. It was certainly better than a bubble counter.
Here is a picture of it action:
1774008536678.webp
As you can see, the reading is below the scale of the meter, but with a marker I could at least set a starting point as I adjusted my CO2 higher. Also the adjustment valve was useless, a tiny turn would shut the flow off or open it to max out the meter.
I ordered the below as a replacement:
1774008611064.webp

2.5-25ml/minute seems like a good range for my tank.
As a bonus the valve is better than most standard regulator needle valves. I can adjust the flow in increments of about 1ml/minute.
Below is the valve in action:
1774008809018.webp

They have been in service for 2 months total now, 1 month each, so still an early review. It has been a solid upgrade though and was an easy install. They come with big 8mm barbed fittings but they can be unscrewed to reveal 1/8 female threads that standard needle valves for aquariums fit. I have also got some 1/8 to push fit fittings that I am yet to install as I am heading away on holiday for 2 weeks soon and don’t want to make any changes for the house-sitters to potentially have to fix!
Pros: adjusting my CO2 was made so much easier by being able to see exactly how much of an increase I was making with each adjustment. Monitoring that the valve isn’t drifting has been easy also, a quick check of the meter tells me it is steady.
Cons: I doubt that the reading is accurate. This means little to me, as I am not using it for a calculation or comparison between tanks. As long as the reading is consistent, even if it is wrong, I am fine with that. Also, the max pressure is listed as 40psi. I am unsure if that is a failure or accuracy maximum. Again, it doesn’t affect me as I run a low regulator pressure due to using a reactor. If I were using a diffuser that needed a high pressure, it may make me nervous.
As always, with any cheap gear, your mileage may vary. But, I thought it was worth sharing as it may help those with limited access to flow meters of appropriate sizes. So far it is proving to be the second best $25 I have spent on this tank, second only to the super red bristlenose I have in the tank.
36 Replies · 2737 views
Art
Art
Staff member I Donated 2026 Founding Member
Last reply · posted in Media of the Month Forum
This month's theme is: plant, hardscape and fish

This one is going to be tough but I hope some of you take up the challenge. Take a picture that captures a plant, some hardscape and at least one fish in the same picture.

Be as artistic and creative as you like.

The rules:
  • Submissions are allowed between October 7 and October 23.
  • Voting will start on October 23 at 12:01 am Eastern time.
  • Voting will end on October 31 at 11:30 pm Eastern time.
The prize:

A $25 store credit from BurrAqua thanks to @Burr740!
14 Replies · 1003 views
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