MarquiseO;1056710 wrote: Get a Red Sea Nitrate test kit. You can get the pro if you want but the the regular one is fine because anything below 2ppm isn't good. For phosphates, get the Hanna checker Ultra low phosphorus. It has 1ppb accuracy. Convert ppb to ppm with this formula: Checker Reading x 3.066 / 1000
+1 on regular red sea.
if you cant detect what ppm no3 you have with it and need the ultra low range. you are way too low.
spectracide stump remover or seachem flourish nitrate are good supplements.