Hi,
I think Gerry’s advice is good both here and
http://www.barrreport.com/co2-aquati...-advice-3.html.
There is a lot going on in 55 liters (14 gallons) of water.
I also think you made a very large step up in lighting going from 9 watts to 32 watts of T-5 and likely a decent reflector along with the fixture. That is a lot of adapting your plants are doing.
My recommendation remains while 32 watts can be done, until things stabilize and you gain more experience, I think if possible, turning off one of those bulbs is a good idea.
Next, just to rephrase what Gerry said, adopt a non-limiting dosing routine; EI would be the choice around here. I know Singapore can be a bit difficult to acquire fertilizers for whatever reasons. Seachem trace is, well, a trace (micro) nutrient provider. What are you using for macronutrients?
Seachem Prime is fine for dechlorinating water but there is no reason to dose the tank.
Stop using Tetra Easy Balance. Do minimum 50% water changes each week.
The algae are an excellent indication things are unbalanced, CO2/circulation is going to be the primary source of your frustration. So meet the challenge head on.
Are you sure CO2 toxicity was responsible for the loss of the Yamato, Caridina multidentata?
Based on the algae it seems unlikely you are getting anything near 30 ppm CO2, let alone enough to kill a critter.
First, gentle (weak) circulation is not good for CO2 dispersal and second, HC, Hemianthus callitrichoides ”Cuba” is a strong current plant, it comes from fast moving waters. A powerhead or additional pumps are in order.
I suspect Nipat may be correct about the temperature. We can often get away with a single problem or outside a single parameter, but multiple problems create a chain reaction.
I think you need some sort of reactor with your CO2, I know this really upset some, but your diffuser is doing little more than making bubbles and blowing CO2 into the atmosphere. At minimum, trap the CO2 under an inverted container. I think you were on the right track when you were setting up your diy CO2, just use the pressurized CO2 instead.
After saying all that, I think that decisive action combined with patience and you will get to your goal. Remember your goal? You can get there.
Biollante
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