Quote:
Originally Posted by Thomas
I've heard talk of a technique called continuous water change here for some of the larger tanks. ...
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This is actually a very simple think to do. Usually a dual head diaphragm pump is used, similar to one of these (offsite link) -
Champion Lighting & Supply :: Dosers :: ReefFiller :: Reef-Filler 2000-2 14 GPD Per Head
One head takes SW water from the tank or sump to the house drain, another takes new SW from a mixing container to the tank. A float switch can be used to prevent the pump from draining the system if there is no new sw in the mixing container.
This system is independent from top off water system, which uses RO/DI water to replace water los through evaporation.
In my opinion, save your money, continuous water change systems are not worth the investment in time and money to set up and are just another point of failure. It's just as easy to draw off 5 gal, or how ever much you are going to change, and replace it with new water at the same temp and SG.