Alson I know that having multiple, or even one, big fish in any tank will add to the bioload tremendously. Currently I do a 15% water change every other week and I feed the fish Nori in the morning. They snack on that throughout the day. At night I feed them some PE Mysis which I also wish out really well myself. I can afford to do a 10-15% water change on the 300 gallon once every other week. With a running refugium, skimmer, and UV
sterilizer etc. Is that enough of a water change to support the boiled of a few big fish? As long as I don't overfeed**??