pH swinging after wc

  • We are currently upgrading MFK. thanks! -neo
Casper2000;2826307; said:
I change 30% weekly, 5 cichlids 3-6", 72G bow front, and I do feed them a lot but only once a day. U think cutting back on the feeding would help?

It may help a little, but if your working with water that has little or no carbonate hardness you have a dangerous situation. There is a good chance for a large pH swing which could result in shock to your fish.

Buy a test kit that will test your kH(carbonat hardness) also refered to as alkalinity with some tests.
 
If you're keeping new world cichlids you're better off with 6.5 than 7.5-8 pH anyway. But if it's high from the tap and crashing to 6.5 my first thought is that you've got a lot of waste hiding in there or in your filter and this is causing a pH crash. You should probably deep clean the tank (take out all the decorations, rinse the filter media, etc). I bet that would solve the crashing.

Even though it sounds like your water is really low on total dissolved solids you should get a legitimate GH/KH test kit anyway. Since you're getting these swings it's important to know where these stand. Chances are you can stabilize things with an epsom salt/sodium bicarbonate buffer. Look up the rift lake recipe to get a feel for how much of a difference that stuff makes - ideally you'd add enough to keep the pH stable but without really making it super hard like an African tank.

I would also make sure I had a good pH test kit too. Not just the cheapo strips. Just in case you're getting false readings. I know that my strips are useful only for nitrate levels... everything else varies every time I dip it. But the pH tester I have that takes work (ie, counting drops) is dead on every time.
 
MonsterFishKeepers.com