Go to your landlord/tenant board and talk to them about this. If it's in the least that you are responsible for the pool, and you took care of it, then there is no reason that they should be able to do this. Hope this helps, good luck to you.

 1st of all, if you left it clean minus normal wear & tear on carpet & u can provide pics as to the condition in which you left said property, then I say no the landlord cannot withhold monies for that.  I am perplexed upon your Q. Re: Propane 4 pool as you state ur agreement clearly states the "tenant" is responsible, well, then my dear you as the previous "tenant" are responsible for that part of the scenario.♥