Hi all, I recently got 3xassort cory from a friend of mine which leaving town to collage. So he give all his fish to me. I lost 1xcory and 1xoto while they were getting use to the new tank water stats my firend use RO system . Now the remain cory dont seems to like bottom feeder at all to me they keep swimming up and down on the glass of my tank and during feeding they swim up for food and wasted my shinking shrine tablet. Is this normal? I'm planning on getting 3xmore cory cat today(different one) and add them to my current 25g to get those 2 in companie hoping they will learn from other to stay on bottom.