Mine eat flake food, mysis shrimp, live brine every now & then as a treat. I try not to feed them much in the way of pallets. The jaw can dislocate easy.
I raise my altos in a pretty much bare tank, so the dom male doesn't bash the rest.... These guys are great jumpers, no gaps in lids.
Once I can figure out best looking male, I start getting rid of the other males. I sex them on body shape.
I use barnacle shells fro breeding. I have tried shells, but they can get stuck in them, once again dam male.
I like the barnacle shell too as you can see eggs, fry etc. The trick here is to take the fry out before they leave the safety of the shell. Once again, dam male, food source.
Raising fry can be very difficult. I have found the white calvus to be hard to raise, as has a couple of mates of mine.
What worked best was bare tank, live micro worm culture. Constant small water changes. I think with this species, live food is best in the early stages. I have tried fry food with limited success.
I do my water changes be emptying the fry tank 1/2 way down. Then topping the fry tank back up with water from the parents tank. {I had fry tanks under parents tanks}Which I had water changed earlier in the day. I use air line tubing to syphon the water in. The young are fragile to changes in water.
The fry can be bastards to when it comes to eating each other. I have had 4 2fts with fry at different stages, just to separate them out.
As I said earlier its 6 months to get them to 3cm.
Frenchy