Bouncing the pH up and down will stress the fish and cause disease outbreaks. Is the pH the same in all your tanks?
Most of the pH adjusters are temporary and cause these large swings.
Right, that's why the LFS gave me the powder...it's called pH Increaser and it's made by Jungle. He told me to put in a quarter tsp to start, so I didn't increase too quickly. It worked, and brought it back up to 7, but then dropped again...it won't stay at 7.
The pH in all my other tanks maintain 7...the water in my tap comes out at 7. Can't understand why it drops in only 1 tank. Someone mentioned to me last night that the PVC pipe I put in could have something to do with it...is that right? I didn't think so, but...
Thanks guys!!