It's NOT right!!! We spend a lot of time making our tanks look good and that stuff appears and makes it look yucky!!!
Unplug it, wait for it to cool, take out.of tank, soak in vinagar.How do you get it off the heaters without ruining them?
That recipe seems a bit redundant. Basically citric acid, acetic acid, sugar and more citric acid.make a paste of lemon aid kool aid (unsweetened) 5% vinegar and household lemon juice (Lucy's brand) let paste sit an hour then scrub/wipe clean. Rinse well . I use this stuff to clean rust stains on concrete.