The point of a continuous water change system is to eliminate the weekly drudgery of changing water, not saving money. It certainly doesn't save any money. I'm getting more and more interested in the carbon filters, especially the carbon block type. But, I'm still thinking about the ammonia being released. I suppose a two stage filter, with an ammonia absorbing media in the second stage would solve that, but I haven't looked into that yet.
I'm also wondering if a pressure regulator is really needed. The flow control needle valve seems to be all that is required, and I can get that pretty cheaply. I'm not sure how well a regulator would work for continuous drops per second flow rates, but I also wonder if a needle valve would survive that very long. |