If that's 2X65 watts CF you can grow a lot of nice low/med. light plants with that lighting.
CO2 would aid in the growth of the plants but I would suggest getting some more plants as well.
Some Anubia and/or Java Fern would look great attached to the wood. Some stem plants such as Ludwigia repens and some more Cryptocoryne.
I found, when starting out with DIY/CO2, in my 55s that it took two reactors daisy- chained together to get anywhere near the concentration of CO2 that I wanted into the water table. I was injecting it, at that time, through an HOB filter similar to yours. That is not the best way to go, however it does work if you get a decent bubble rate and muffle the water coming out of the filter at the return to minimize surface disturbance.
As to your original question regarding a pH crash. I am finding after years of being cautious about injecting with low kH buffer, that there are two schools of thought on this issue. I don't know what your water's kH is but with DIY CO2 you will not be getting the kind of concentrations of gas that would threaten your fish, IMO.
This may be academic however, because as I read and search for information I'm coming to the conclusion that the kH/CO2 issue is not nearly as critical as I've believed it to be in the past.
Len
CO2 would aid in the growth of the plants but I would suggest getting some more plants as well.
Some Anubia and/or Java Fern would look great attached to the wood. Some stem plants such as Ludwigia repens and some more Cryptocoryne.
I found, when starting out with DIY/CO2, in my 55s that it took two reactors daisy- chained together to get anywhere near the concentration of CO2 that I wanted into the water table. I was injecting it, at that time, through an HOB filter similar to yours. That is not the best way to go, however it does work if you get a decent bubble rate and muffle the water coming out of the filter at the return to minimize surface disturbance.
As to your original question regarding a pH crash. I am finding after years of being cautious about injecting with low kH buffer, that there are two schools of thought on this issue. I don't know what your water's kH is but with DIY CO2 you will not be getting the kind of concentrations of gas that would threaten your fish, IMO.
This may be academic however, because as I read and search for information I'm coming to the conclusion that the kH/CO2 issue is not nearly as critical as I've believed it to be in the past.
Len
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