They will if you work with them and its a great food. Allot of people gave had an easier time with the 7.5mm floating food. Might be something to get them on. Especially if they hit off the top.
I use both Xtreme Monster and NLS Mega. My fish like them both.
Both great alternatives. I don't think you can go wrong with either but I find more dust in the bottom of the Xtreme tubs. NLS seems to stay together a little better, but it does make for a very hard pellet compared to the other 2.
I would love to say you will not have any problems switching them and that on the first try they will eat it but honestly they wont. You will have to starve them and work with them. The 10mm is a very nice pellet and they will hit it because its the same size but wont fully eat it till you spend the time working with them on it. But once they are on it you will be giving them a great quality food. I ordered mine through big al's recently but I think they are out but I found amazon has it so it seems