My tank is three weeks old today. I started out doing a fishless cycle. On Day 3, due to a very kind and sweet husband, who did NOT understand the term "fishless cycle", I was the proud owner of 13 platys! All the fish have been treated and are doing great and my plants are growing. I've attached a picture of my water parameters. I've been doing 30% water changes every four or five days and of course the ammonia goes back down. My question is: how does my tank fully cycle if I keep doing the water changes? Is it just a slower process because of the fish and having to do water changes? Thanks for any help.