I personally increase the frequency of my water changes, but lower the amount changed. My logic being you need water changes, but you also need the environment as stable as possible. So changing less water at a time helps prevent stress while increasing frequency keeps it relatively equal in it's effectiveness to eliminate waste and other negative by products. This is just my personal method and I'm definitely no expert, but I have raised cichlids before and it's worked just fine for me. Hope this helps you out and congrats on breeding, good luck.