I’ve used the entire Red Sea system before for several months, several bottles of zeovit additives, elos additives, and acro power. All at various points over the years. All given an honest shot and lengthy run. I can honestly find absolutely zero discernible difference in growth or color when using any of these products. I DO like to keep some amino acids on hand if nutrients get too low and I will use those liberally to avoid developing brittle tissue. Just about all of those additives do their very marginal work when nutrients are driven to undetectable levels. If you’re measuring PO4 and no3 at detectable levels, any positive effect you get from these enhancer products is likely placebo, or more likely attributed to longer term stability and age
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