I am baffled as to why the rubber plecos I buy keep dying the next day after purchase. They are in a 5gal tank with small female beta and 2 small African dwarf frogs. I will upgrade the tank size in a month or so but that shouldn’t be the reason they are dying next day right? I did a water test and everything was normal. All the other fish are fine, it’s just the rubber plecos. The filter I have agitates the top of the tank so air bubbles reach the bottom as well. I also got some small pieces of driftwood to put into the tank with them but nothing I do seems to be helping. I’m at a loss and any advice would be appreciated.