Why Are My Nitrates So High?

[Matt_northants]

Have you checked the level in your tap water? Your water company may be supplying water with higher nitrates for some reason.

Told you!

Ha ha ok thanks backtotropical! Still hoping it's the test kit though otherwise I don't know what to do!

You could use RO water until the level of nitrate in your tapwater drops or you could use APIs Nitragon.