Do you guys have any suggestions for things to buy, just make suggestions and I'll let you know if I have it yet or not. My budget is 50 dollars and it has to be on amazon. My tank (fluval flex 15g) is already set up. Not many issues, not sure what to buy next. I have an ATO, I have coral/fish food, things to dose, turkey basters, test kits, and more. Please let me know what you think I should buy that could help with my tank.