Did the 50% water change.
You mean cleaners like hermit crabs and ghost shrimp??
Well, that's already been taken care of!
The thing I am worried about is the calcium levels and carbonate levels being so high. I mean, I literally had to get a rough estimate because they were off the scale!
Another thing too- this is a 30 gallon (114 liter) tank. I have a 530 gallon per hour (2,006 liter per hour) powerhead, plus 2 filters that combined make about 565 liters per hour of output.
Is this too high of a current for my tank?
rowaphos?
Looked that up and it is only for sale in the UK. Is there a good US brand that sells phosphate remover?