Hello, I have a 50gal walstad tank, planted heavily. It currently has 3 pearl gouramis and 1 small rupperlip pleco. I have very hard, high pH water at 8.2, and I'd really like a unique, tight schooling fish, but I know most like slightly acidic water. I've only found Emerald Rasbora that actually seem to like my kind of water, but they're so small, I'd like something a little larger. Does anyone have ideas or personal experience they'd like to share?