Polishing the inside of an acrylic tank

[Jasonrusso]

I recently purchased a used 150 gallon acrylic tank. I didn't realize how many scratches were inside until after it was filled up with the lights on. It is a fish only with plenty of rock. I have read of people polishing the inside without removing the livestock. I'm willing to try anything and labor is not an issue. I'll spend an entire Saturday if I need to. I just don't want to endanger my fish. I have good flow (1200 gph and 2 1500 powerheads, dual corner overflow) so the stuff should be filtered out pretty quick. I have this kit that I bought for the outside:
Lifegard Aquatics Acrylic Scratch Removal Kit 72000

 

[wildroseofky]

I don't know about doing it underwater but I do know that you can get a kit cheaper at walmart or an auto store. They are used to polish headlights on cars. I bought one for $10. I would think that the grit would foul up the water and be hard on the impeller.

 

[T1KARMANN]

You don't notice the scratches inside as much once the tank is full of water

 

[Jasonrusso]

It is filled I knew that most of them would be filled in. However, there are some big ones.

 

[T1KARMANN]

Well you would need to drain it and buy a polishing kit

I think tennor make a good one I think that's how you spell it they are a well known acrylic tank maker in the US