I’m looking for some help troubleshooting hair algae that’s absolutely destroying my Wallichii.
The Wallichii was planted as tissue cultures when I first rescaped the tank. The hair algae is heavily attached to the stems and manual removal hasn’t been very successful—it doesn’t want to let go of the plants.
My biggest concern right now is honestly the algae. I know my CO₂ isn’t where I want it to be, but the algae is getting bad enough that I’m worried it’s going to kill a huge portion of the Wallichii before I get everything dialed in.
Current setup:
UNS 20
Skylight Hyperspot at 100 percent
Photoperiod: 7:30 AM–3:15 PM
Apt 3 1 pump per gallon during weekly water change
CO₂ via inline atomizer
Parameters (5/30):
- pH: 6.6
- NH₃/NH₄: 0
- NO₂: 0
- NO₃: 20–30 ppm
- GH: 14
- KH: 4
- TDS: 323
- CO2: 65ppm midway through photo period
I’m also struggling to get my CO₂ dialed in consistently. The CO₂ reading was about 65 ppm around the middle of the photoperiod, but I had just turned the bubbles per second down because it was clearly too high. If I lower it enough to avoid overshooting, it seems perfect at lights-on but ends up too low by the middle of the day. If I raise it enough to maintain levels later in the photoperiod, I overshoot and end up where I am now.
I’ve tried manually removing the algae, but it’s so attached to the Wallichii that I can’t really get it off without damaging the plants.
At this point I’m trying to figure out:
- Is this primarily a CO₂ stability issue?
- Is the Hyperspot too much light for this tank?
- Should I be aggressively trimming/removing affected stems?
- What would you do to stop the algae before it wipes out the Wallichii?
Any advice would be appreciated. I’m feeling like I’m chasing multiple problems at once and the algae is winning.







