Once the tank is cycled, do whatever it takes to keep your nitrates as low as you can for the most part. For me, it's about 50% once a week. I have an Oscar and a few raphaels, an L200 and a false jaguar cat in a 125g.
Just getting ready to start on all my tanks tonight. All my tanks geta 50% w/c every 5-7 days. With the exception of the 450g which only gets a 33% every 5-7 days