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Do I need water to dilute distilled vinegar or just apply vinegar direct. Do I apply and scrub or let it stand for a while? What part vinegar to water I water is needed?
What I did was put the tank in the bath tub (this was a 10 gallon not sure what to do with anything larger) and filled it up with hot water. Then I poured some vinegar in after the tank was filled. I let it sit for a couple of hours. All the crap that was in the tank come off with no problem and the tank looks brand new.
Angels and rams temperaments are fine together, but their temp needs are different. Gbr's need the tank to be hotter at about 30 degrees c, and at that temp angels will grow rapidly and die a lot younger, and I wouldn't keep angels with neons either. As the angels get bigger they will probably ambush hunt the neons at night and you'll come down in the morning to less neons.