I know there has been allot of debate over large weekly water changes and if you should do them or not. So just wanted to share my experience.
I have been keeping fish since I was 9 and am now 38 so just under 30 years of keeping fish. I started with my 10 gallon full of tetras then grew into keeping large salt,brackish and fresh water systems. When I started I new nothing of water changes I just topped it off and every once in a while I would loose a tetra here and there. I would replace them my thought is they are little fish they don't live long. Then I went through the phase of scrubbing the tank out every few months giving it a good cleaning (which you should not do)
I then learned about water changes and did a large water change every month or two with my vacuum and 5 gallon buckets. That phase lasted into my 20's never really lost any fish and they where doing well, so I thought. They weren't dying but they weren't as big and colorful as my fish are now. In that time I experimented with the right combination of fish and plants to make my WC less frequent. I made sure I had the right bottom feeders and alges eaters, using fish to try and do the job I should have been doing. Over all my tanks were doing well, Every once in a while I would see the problems people have on here. Algea bloom, Ich, bloat all stuff we all deal with.
About 8 or 9 years ago I got a python which made water changes super simple so since then about every week or two I do a 50%-75% water change.
Recently I was reading through some of the beginner threads and the "PLEASE HELP!!! threads" I realized I haven't had any real tank issues in years. I don't deal with any of these issues not even algae!
I only test my water about once or twice a year just for fun and it is always spot on. So the only think I can accredit my success to is Water Changes.
Taking 1 hour every week or two and I can't remember the last time I lost a fish. Ich out breaks used to decimate my tanks now the last out break I had was about 4 years ago. My fish are bigger and more colorful. I love firemouths and I see many firemouths that are drab grey with red bellies. My Firemouths that were born in my tank have all colors of the rainbow. I credit that to good feeding and water changes.
People can say what they want to and tell me I am wrong that it doesn't need to be done but this has been my experience so I am sticking with what is working.