We put a pair of blue rams in our 29 gallon hex a couple of months ago. The female looked pretty tentative since the trip home. She only made it a couple of days. The male looked better and seemed to be content. He made a little nest in the rocks under the driftwood, ate well, and had beautiful coloring (yesterday). And now he is dead. The nitrates in this tank tend to creep up a little to about 30 from time to time. It is filtered, planted, and we do water changes. Still, the nitrates creep. I have read that rams are sensitive to nitrate. Are there any other dwarf cichlids or similar fish that might be a little hardier? (The platies, otto, and killi look great).