Hi guys,
saw this very interesting article about mixing kalkwasser with vinegar
stated that its a win-win situation
http://www.reefscapes.net/articles/breefcase/kalkwasser.html
well why do you need the pump in the sump for anyway when you want to decrease the heat by using an external pump
IMO it totally defeats the purpose
Maybe Eric want to go in depth :lol:
well, people in RC have done it
if i am not wrong, its you jet water onto the water surface in the box and this causes the bubbles
at least that's what i think