I have two albino bichirs. Got them at the same time from supposedly the same clutch. Tiny tiny.

Got them about 5 months ago and only one of them is growing. The growing one is about twice the length and twice the width of the other one. I take the smaller one out and feed him separately and more often than the main tank. Over the last month I've seen no change in his size. He looks the same size as when I got him .Especially compared the the bigger one that I got at the same time. Water parameters are fine and water changes are done almost weekly. Food in the tank includes normal fish flakes, freeze dried bloodworms, and algae pellets. Anything else I should be doing/looking for. Just odd to see one growing and the other not.

Thanks.