Saddle Tank Cleaning

[Hedge]

Thanks for the responses.

First of all the tanks are dry, and have been for years. I just run from portable tanks but I want to check them out and get them useable to gain back space taken by the portable tanks. I like the food coloring idea to determine a leak.

I think I will fill them in the boat just to see if they leak or not. Then I will remove to clean and replace all the lines while they are out.