Thanks, I like the little nano power head idea. I appreciate your input as the dosing amounts are quite high but obviously required for the system. I am dosing standard BRS: Calcium chloride, Sodium carbonate, and their Mag chloride/sulfate mix. I use kalk for my ATO which helps and I think you dose it as well. I have a calcium reactor but have not set it up (one more item to potentially fail), I like to keep my system as simple as possible. I am used to the BRS products yet the daily amounts are high compared to smaller systems. I have not tried a "super saturated" solution as you have but may consider it to decrease the dosing times. I will need to see how much I can get into solution especially the Soda ash. Thanks again, I appreciate your prompt responses.