I'm planning an outside enclosure for my yellow bellied slider. The idea would be to build a fiberglass tank with a basking Island and a partly shaded "beach".

My initial idea was to make it a clear colour and try to mimick rocks with light grey strikes, but mostly every pond I see is very dark.

Would there be a reason to choose a dark colour over a lighter one or is it just a question of taste?

1 Answer 1


Most liners for ponds are black or grey; this is mostly for UV protection to make the liner last longer in the sunlight.

Pre-formed ponds are often black for the same reason, but they can be painted in any color you want.

A black pond will give protection against some predatory birds, as they will have problems judging how deep the pond is (herons and other wading birds).

A black or dark color will, to some degree, hide algae growth and make the pond look cleaner.

Fish breeders will often use a light blue or light green pond to show the colors of the fish better.

There is no problem to use any color you want in your pond but the lighter colors get dirty quicker.

If you are making your own fiberglass pond, you can buy colored aquarium sand in a pet shop and sprinkle this on the inside of your pond by using a thin layer of polyester as glue (it makes it easier for animals to get out of the water and it looks more natural).

  • 3
    And unless you clean it often , the bottom will soon be nearly black from leaves,etc. Commented May 23, 2019 at 18:59

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.