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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.



View attachment y2.mp4

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.



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.

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.


That's it for now, this will probably be a very slow build so be warned if you follow along!

Time to start a new thread.

I’ll fill in some details later, but I’m working on the hardscape now. Any and all criticism is appreciated. The vision is nothing more, and nothing less, than something appealing to the eye.

90cm x 30cm x 30cm Lifegard Aquatics ultra clear bookshelf tank. Buce and anubias on the hardscape, stems towards the back and center, mid to front carpet with some changes in shade and texture down to a flat grade on the right side of the tank.

Lily pipe inlet and skimmer will be in the back left corner with the outflow in the front left to hopefully achieve circular flow. I’ll be running an in-line diffuser. Light will be the P600 Pro that I regrettably did not upside to 900. Oh well. I’ll mount it high and hopefully it’ll have enough spread.

I have some dragon stone and red lava rock rubble I’ll use at the base to blend into the substrate, as well as some stratum I may or may not cap with.

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?

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.

Welcome to ScapeCrunch, @kneeshg!
We would love to get to know you. Please tell us about yourself. What tank do you have?

Welcome to ScapeCrunch, @Ilja!
We would love to get to know you. Please tell us about yourself. What tank do you have?

Welcome to ScapeCrunch, @Renuprajan!
We would love to get to know you. Please tell us about yourself. What tank do you have?

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?

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.