I've left my aquarium for the first time since building it. I'm on vac in fl. The system seems pretty stable, and I prepaired daily feeding portions for my friend who is feeding and adding TO water. It's a big step, but the tank has been running realy good for the last 3 weeks, with nitrates, & phosphates near 0. Ph staying At 8, Calcium @ 450. Just use buffer, and don't need to dose . And all inhabitants happy. My green hair algae has all but dissapeared over the last weak or so too. Tank was started in jan, but had a few issues early on. It's been on track since early March.