IMO, 'if it ain't broke, don't fix it'. How much GFO you should use, flow rate and frequency of changing it will depend completely on your system; things like RODI vs tapwater, feeding regime, skimmer efficacy etc. will be different for everyone and dictate what your needs will be. The only way to determine how much to use is to start with the basic amount suggested by the product guidelines and watch what happens. You may want to test your PO4 now with something like a Hannah colorimeter to see what levels your tank is currently happy with. I often see the number 0.03ppm quoted as a desired target, but if your tank is happy and measures different, I would target for your current value. Adjust volume of GFO and flow rate to keep it there. This might require testing your PO4 every day or two for a couple of weeks to get things dialled in. Perhaps a good low range PO4 tester would be a good thing to borrow or buy for this period. If your corals start losing their colour, it may be an indication of too low of a phosphate level. As for rinsing, I always rinse all media with RODI water until it rinses clear.
Dan
Dan
|