hmmm.. how long have you had this high light set up for? for me.. when i switched from 36w to 55w... the tank looked like 7up for about 2 weeks.... then after that i guessed the plants got used to it and bubbling stopped.. and soon algae came... now i changed back to 36w...
btw... how are you introducing CO2 into your tank? diffusor or reactor? (is that weird looking green cylinder the reactor?) if by reactor, can tell me what's the flowrate of water powering the reactor? cos i can never get the rate of CO2 dissolved into my 10 gallon while using a reactor high enough with 500l/h flowrate
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