Do not let it go anaerobic - IME you will see a rising cancentration of Si in your ICP tests
Also gave this thing a go, a ZeoVibe reactor filled with Siporax Pond as Biofilter. The Siporax in my Sump always clogs so I'm giving the 300Gallon filtration system some support with this method of applying the Siporax. From experience the Siporax will do quite a good job of reducing No3, but not that good on the Po4 hence I keep the 2 Chaeto Reactors working. Will let it grow for a while before start using the Vibe function.
By the way - you have a very beatuful tank
Sincerely Lasse
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