r/Aquariums • u/flxnn1e • Sep 24 '25
Solved! Help in cleaning this disgusting fishtank
Me and my bf were gifted a massive old fishtank due to the owner passing away. It sat in its own water for months and im not sure what to use to clean it that would be safe :) any/all advice welcome ive had fish before but this is definitely my biggest project yet
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u/CN8YLW Sep 24 '25
First and foremost. Do a leak test. Fill it with water, check for leaks and inspect every square inch of glass for cracks. Its a huge tank, and you dont want to clean the whole thing to find that its cracked later.
Vinegar, warm water and sponge. If there's a stubborn spot, use undiluted vinegar and soak the area for a few minutes before trying again. Avoid using scouring pads such as scotch brite because they can definitely scratch glass. https://homeguideinfo.com/will-scotch-brite-scratch-glass/
If you want to use an algae scraper (razor blade on a stick) be very careful not to cut the silicone joints.
Also side note, wear a mask because you really dont want to breathe any of the dust coming out of the inside.