Hi Everyone. I just upgraded my 65 gallon tank to a 90 gallon. I know that 5 fancy goldfish in a 90 gallon tank is slightly higher than the recommended amount. I would prefer to stick to one water change a week if I can. Can I change a little bit more than 50 % water during my weekly water change and be ok with 5 fancy goldfish? Has anyone tried 5 in a 90 gallon before? If not I will just stick to 4 fish. Also, I was planning on using an aqua clear 110 and an emperor 400 hob filter so I think I should be good on filtration. Any advice would be greatly appreciated. Thank you!