jp80911;4239480; said:could it be something (residue) on the glass? or in filter media or on other equipments?
you just have to test them out one by one if you want to find out the source. run them in a smaller container one by one and see what is causing it.
Cliff.W.;4239486; said:Hmm.... good idea... But is this a known problem for big tanks? that PH rises or drops cause most of it is new primed water? then after a few weeks or months the water stables down to another PH again?
Cliff.W.;4239603; said:If the 8 PH is permanent in my 180g tank then I'll add drift into the tank and bring it down. I'm just afraid that if whatever is causing the PH to rise right now all of a suddent dissapears and lowers the PH on its own and at the same time i have the drift inside tank lowering the PH even more then my fish would die out.
Gobrian44;4239811; said:Did u properly rinse all the media in the filter? i know the ac 110 rings can put out a lot of dust and crap when they are not fully washed out... so its a maybe just trying to help!
Burtess;4239780; said:Do you have other tanks? Do they have this problem with water changes?
Could be that with water changes, you add water with a high dissolved CO2. This will cause a pH drop (carbonic acid).
Take a bucket of tap water and check pH. Aerate the water for a day and check it again. If the pH goes up, this confirms high dissolved CO2.
Burt![]()