low ph

[at]

I am having problems keeping my PH above 8.0 I have added Seachem's Reef Buffer at least twice a week, at night it drops to 7.8 to7.9

[davejnz]

Try dripping kalkwasser in your tank at night.I use kalk/limewater 24/7 and it works very well at maintaining PH/calc/alk IME

[at]

I put a gallon of kalkwasser a night in the tank with a drip doser. If I dump the kalkwasser right in the PH goes up but drops by morning. Every book iv'e read said you shouldn't raise the PH too quickly anyway.

[davejnz]

Kalwasser shouled never be poured right in,this causes PH to rise too high and the alk/calc then start precipitating.Then your levels are lower than what they originally were.What size is your tank?IME,kalk/limewater alone is able to keep my parameters stable;PH levels(8.2night,8.4day),alk-9dKH,and calc-420ppm.If your adding kalk/lime daily and still having PH troubles,you might have a gas exchange problem,this can be fixed by adding airstones in your tank at night. will correct.

[at]

The tank is 155 gallons and I have a glass cover on it. Do you think that is a problem? If it is, how do I keep the fish from jumping out?

[dakar]

The glass cover stops the gas exchange and can have a dramatic effect on pH as CO2 builds up in the water column pH will drop. Use some eggcrate (aka light diffuser panel) if you are worried about critters jumping out.