I've managed to raise Blue Ram fry to free swimming stage (5-6 times already), but then they just seem to loose ground and die off. I've tried loading their container with plant material (for microorganisms as food), and starting to feed them microworms (brine shrimp seemed too large) almost even before they become free swimming. They seem to do fine, but then gradually fade away and die in a week or two. Any thoughts or ideas as to what I might be doing wrong? I've tried using straight RO water, tank water, airstones set at different levels and bubbling with varying intensity, temp. set at 27.5 degrees, daily water changes/no water changes....