Wow. These guys are looking good. Very nice for almost a month old. They are looking really good. I've had that feeling before, but when they are really tiny with no pigment at all, I'm saying 'GROW ALREADY!' :)
You're doing a good job. Are these DT's? Who are the parents?
Well this will be an interesting spawn. I love doubletails. I thought DT because of the first fry pictured has a very distinct wide dorsal that you usually don't see on fry. Can you post pictures of the parents?