Cachepot and Water Garden - pots without drainage holes
I have a few large glazed ceramic planters (about 10 gallons) that do not have drainage holes. I am thinking about using them as a cachepot, since I know most plants do need drainage holes. What's the best way to do this and what plants would work well in this situation? I plan to have these planter inside.
I also have two larger (16 gallon) ceramic planters without drainage holes that I plan to convert into a water garden. Any tips of what plants/fish I could put in it, and if I would need a pump? These are about 16 gallons.
Pictures of both kinds here: