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KCL won't dissolve

Hi @eminor

Diatoms require silica, sulphur and carbonate. So, when you were dosing potassium sulphate (K2SO4), you would have been adding sulphur to your tank. When dosing potassium chloride (KCl), sulphur would not be present. You may find the following scientific paper to be of interest. But, I don't recommend it for bedtime reading as it is quite detailed. Here it is:


JPC
Thanks, i think blaming k2so4 was an excuse for poor CO2, i'll read, thank !!

where does silica can come from with active soil ? i don't think i add any ?
 
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