Alright so I have a question. Normally, when I changes any of my male Betta's water I fill up a bucket, let it sit for a few hours to hit room temperature, add water conditioner, and then do the switch (along with cleaning gravel, plants, etc.) Sometimes after I do the changes one or another of my fish get kind of lazy, don't swim much, stop making bubble nests, stop eating for a few days, etc. They always bounce back but I was wondering, if I did a 25% water changed in my aquarium with my other fish and a bunch of live plants, then let the filter run for a few hours and sucked back another 25% or so out of the tank, could I use it to use for my male Betta's water changes? Would it be beneficial to my males or would it just stress them out "smelling" other fish in their water? I was just thinking because that water is kept in a very good balance.... someone let me know! Thanks!