I am not sure, OP said 'I installed a pool'. If it was a leak, they wouldn't say installed? But I agree the FML worded strangely, cause I don't see how that is possible...

Christ there's some dense people around here. People really took "installed a pool" at face value? Irony and sarcasm, guys. Look it up.

Yeah, totally agree, there are dense people out there. That's why I wouldn't be surprised if one day someone actually tries to install a pool in their hallway and then gets shocked when it doesn't work. And some FML are worded funnily sometimes, like that lady who said her son hit another kid with a baseball bat try to hit a pinata, but there was no pinata in the first place. So yeah, I know irony and sarcasm, it's just hard to read it sometimes :)

To OP: Ooops sorry. Thanks for the explanation. If you tell a contractor there is a risk of black mould, wouldn't that count as an "emergency fix" ?

I've done that.. I need to replace the flooring in my bathroom before I move out from it.

Yeah they have ripped all of the flooring out, which is great, but now my house is all concrete. I live in Melbourne in Australia and we are in some of the tightest COVID lockdowns in the world. There are no stores or showrooms open so I can’t choose new flooring (the carpet and hardwood I used to have has been discontinued).