ph up

[discusfantasy]

Hi

Can someone tell me what i should add to my discus tank so the ph stays above 6.6 please? my ph now is about 5.9 & i do about 200lt water change ever 2nd day from my 600lt discus tank

Thankyou

[waitaki]

have you tried seachem ph buffer? or I believe crushed coral will buffer the ph. Having your ph at 6 - 6.6 is not a bad thing, I try and keep mine between 6 and 6.4. Provided your ph is stable between water changes it's ok and you should need to raise it. What is the ph reading from the tap?