I have great success with SPS in nano tank. All you need is stability. Dosing pump and ato should help you with that. Regarding diatom, you may want to stop carbon dose if you doing so. And keep that tank bit more dirty. 0 parameter no3 and po4 isnt always good. Also dose more bacteria. I personally prefer Microbelift special blend. Smells like shit but works like wonder. Good luck Sent from my SM-G930F using Tapatalk