The whole thing has me baffled.... Again. These guys have been ok the whole time. Both began eating crawlers after the first couple days and haven't missed a meal since. Been climbing the walls and playing in the bubbles for a couple weeks now.
They are in a 4x3x1.5' tank. Tank is divided down the middle. These 2 pups on one side, and 2 little females on the other side (both around 6"). The tank is filtered with a pot scrubbie and ceramic ring filled 55 gallon sump, little 1K gph pump, and a single canister filter.