HI Tunicate,
(1) Check your water source. If from tap, filter it with DI or RO+DI.
I am using DI water.
(2) Need to increase water movement in tank using wave maker.
I have 2 wave makers. One pointing towards the surface for water agitation, and one position at the mid depth. Wonder if my positioning of the wave makers is wrong..
(3) Install a decent protein skimmer if you do not already have one.
I have a Protein skimmer.