I have a 100 gal planted tank. The ph is always at 7.1-7.2. I push co2 that goes on after the light do and is cut off before the lights ona timer (about a bps) I have had a few ph crashes over the years, the most recent being this weekend. I did a WC with R/O water and added the mineral buffer (2 teas per 5 gal) the same way I do every time I do a change.
I finished the change (about a 15 gallon change) at about 8pm and for the remaining 4 hours the lights were on, all seemed well-the fish ate before I went to bed. I woke up the next day to half my fish gone.
All my crashes (including this one) happened after the lights went out and after a water change.
Is it that I am replacing water with R/O water with a much different ph? Is there not enough minerals to buffer the water? Too much co2 in the water? Should I add an air stone at night?
Right now the remaining fish are breathing at the top of the tank.
I have been unsuccessfully keeping talks for a while now and need to know WTF I am doing wrong. So disapppointed in myself!
Thanks in advance for guidance.
I finished the change (about a 15 gallon change) at about 8pm and for the remaining 4 hours the lights were on, all seemed well-the fish ate before I went to bed. I woke up the next day to half my fish gone.
All my crashes (including this one) happened after the lights went out and after a water change.
Is it that I am replacing water with R/O water with a much different ph? Is there not enough minerals to buffer the water? Too much co2 in the water? Should I add an air stone at night?
Right now the remaining fish are breathing at the top of the tank.
I have been unsuccessfully keeping talks for a while now and need to know WTF I am doing wrong. So disapppointed in myself!
Thanks in advance for guidance.
