1 ft tank should be adequate for 15 fries. BTW what type of fries? Rubra? Suggest to have more aquatic plants like java fern etc for hiding. A small filter should be better and if you already have the pump for your other fishes nearby, tapping another line won't hurt. Haha I believe it is in your bedroom, then sure have noise but after awhile of getting use to it should sleep well.
I have a 100 pugnax fries in a 1 ft pet container on its first month and shift them to a 1.5 ft in the second month, now in a 2 feet tank with air filter. These buggers eat a lot and excrete a lot as well Use hydrilla and java plantlets for hiding. Add a couple of ketapang leave for hiding as well.
Of course, different people will use different method, most important to me is the water condition for fries. Hope this helps.
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