jlneng, is my buddy and mentor when it comes to this hoppy, I get his over flows, he knows his stuff and always does all the research. Lucky to have him, but we do have IMO depates, and we pool are info, experience and loses in the tank, one thing we learned water changes with IO 20-30% every 10-14 days, just perks up everything and do not have to add all those trace elimates, 5-10 % does not do anything. I run a Kalkwasser drip to maintain, John runs a Calcium reactor, I have just not spent the money for one. We love the Hydors, time will tell on there longevity.
Bob
Bob