11-03-2007, 10:35 AM
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Pinpoint makes reliable controllers. They measure the PH in the reactor, if it rises above your "set point" (Typically 7.6) it will begin churning out low PH water from the CA reactor until the reactors parameters are met. Efficiency will be dictated by the controller and media. If you have your CO2 set incorrectly it will quickly turn your media to pudding. It will still work but look horrible. There is a slight chance your media could even turn to cement and solidify if left like that. In the end a point of 7.6-7.8PH is typical when "dialed in".
With the amount of detail you've put into the tank I'd skip a single PH controller as they are expensive by themselves. A good one could easily set you back $200. Instead spend $300 on a ReefKeeperII (2)controller (or other similar controller, but RKII is about the simplest and cheapest). You will get a controller that will run chillers, time several lights together, has an auxillary function that if the water gets to hot even with a chiller (or if there isn't one) it will kill the lighting to save the tank, runs your CA reactor, wave maker modes for power heads, etc. etc.... No more stand full of "junk" timers, power strips, fire hazards, cords, controllers etc.. Just a very nice easy to program computer for your tank.