Hanna PO4 testing

[Aquattro]

Originally Posted by Borderjumper

Did you put the fish back in yet? I'm thinking leaving your tank fish less for had something to do with the zero reading?

Half the fish were in, the rest just went in now. But I fed the tank even without fish, as I have a lot of hermits, shrimps, etc...

I've always had low readings though, but I did expect some PO4. I'll test again in a month and see what the full fish load does.