How much make up water do you need made up....it's a 30 gallon tank..?I have to dose NO3 and PO4 or my levels would fall to zero due to my refugium. I need to have it as a nutrient export because I'm not equipped to make and store large volumes of rodi. AFR (for arguments sake) is basically just a 2 part with added magnesium and trace elements. AB+ is just amino acids and carbohydrates (ie food). The Microbactor products are beneficial bacteria products and used by a lot of reefers with great success, and the Chaeto Gro is just iron and trace elements that the chaeto would otherwise pull out of the tank if not replenished.