Current Levels! Need Advice!

[sergiotami]

I'm changing water tomorrow, should I test after I do water change... I have no sponge but about one inch of sand in tank...

[Troy Valentine]

Do you have any clams, if so what size? First I would check the test kit validity. Test a fresh batch of SW, Tell us what brand salt you are using so we can get a consensus.

[sergiotami]

I use Instant Ocean and have two clams. I use Red Sea Test kit....