Hi there! So i recently got an 8 gallon tall, and i have a young koi female betta i want to put in there. Im also going to be putting in shrimps and a snail. I would really like to put in some mosquito rasboras and/or rosy loaches, but if i give both species a full school of 6, im Way overstocked. Any suggestions for similar fish that require smaller schools? I want small schooling fish for the middle ground, and at least one small bottom feeder to keep the sand clean.