Which plants will my fish not eat?

I was asked this question twice this morning - not sure why but felt it prompted a quick blog post.

If your fish eat plants, you are massively restricted with regards to the plants that you will ever grow and keep in your tank. So you have 2 choices:

1. move the fish on to someone who wants your fish
2. only keep a few species of plants

I know which choice I would have! But if yours is the second option we have a selection of plants that either taste horrible or are simply too tough to digest. Who knows which!

You can find the non edible plants here.