...what are you using? I'm trying to figure out the best option for a low-cost dosing automation. This will be a temporary fix until I can fork out the cash for dosing pumps. My calcium and alkalinity are fluctuating too much.
I've seen everything from Aqualifters to air pumps...whatcha got?
Maybe "low-cost" automation is too risky. I might just start mixing up my own 2-part (using reef products, not "raw" chemicals) if I can't figure out a decent wannabe dosing thingamajig.
Just trying to get some ideas to go on.