Huge Urn, glazed outside but unglazed inside, water still seeps when filled, how to waterproof it for fishes?

Question

The urn is unglazed on the inside though its glazed outside water still seeps out and gets wet on its side, slowly dripping water to the floor, need to waterproof it to prevent seepage as I am putting it indoors on wooden floor and planning to rear fish in it.....hope I can get help on this thanks

Answer 1

Make sure the pot is completely dry and then paint the inside with a polyurethane varnish such as yatch varnish, allow it to dry and give it two or three coats. This should be be safe and water proof for fish.

Answer 2

Buy an ornamental sealer spray from the hardware store and apply a couple of coats on the inside of the urn. It should be TOTALLY dry before you put the first coat on. Before applying the second coat, the first coat should be totally dried out. I have had success with this and my fish thrive in the pot. A nice papyrus plant placed inside the urn would add a nice feature and also create a nice environment for the fish.

Answer 3

There is pond liner. Really thick plastic that goes on top of the dirt and under the water in ponds. You can get it at hardware stores and cut it to size.
There is aquarium sealer. It's what they use to put aquariums together and seal leaks. You could paint it into the urn. Give it a few coats, and it stinks, so do it outdoors. Get it at pet stores and Walmart.
Hope this helps.