Someone explain to me this!

[freeze]

I started off with the standard API when I was FOWLR. Now I have three different test kits for each.....I test twice a month on two kits. They should be close. Only took my water in once and that's when bad stuff was happening and I just couldn't figure it out. Tests are a must even if it's just an API kit. They aren't perfect but it's easy to tell what the bad colors look like. If your going to drop hundreds - thousands in fish and coral in your tank, 50-100 in test kits sounds like a decent investment.