How best to lift my pH so that it stays higher?

[David Middleton]

Following my disastrous ammonia spike of a few months back (which killed all my fish -most in excess of 5 years old) I have cycled my 200 litre tank and now Ammonia, Nitrites and Nitrates are all very good again. During the process I had read that the cycling would be speeded up the higher my pH was. I purchased some crushed coral and within a day or so pH was 7. I would like to retain it around that figure but it has returned to about 6.2 - despite coral still being in tank. Is there a long term solution that does not involve constant adding of chemicals etc? I think Edinburgh water is naturally about 6.8.

 

[Magnum Man]

maybe limestone slabs???

 

[seangee]

What fish do you keep or are you planning to keep? 6.8 is perfect for many tropical fish from South America or Asia. I try to keep my tanks lower than that. I am actually envious of your tap water.