diy decor

After 7 long and un-utilized years without an aquarium set up, I have at long last settled into a new home that I don't plan on leaving any time soon. During our housewarming party, a friend offered her old 36 gallon aquarium/stand. I gladly accepted it with grand plans of doing a freshwater...

What type of sealer would I use over plastic? Specifically a small toy to make it salt water safe. I've read everything from silicone type 1 to UV resistant epoxy to you don't even need to seal plastic... I'd like to know from someone who has actually done this with no issues what I would need...