Yes, the floaters would probably help do that - although there shouldn't be a need for them if you have a BB tank, are doing large frequent wcs, and have a good sponge filter.
Looking for discus fry in So Cal ? -
Kenny's Discus in Daley City, Ca. is probably one of, if not the best, for discus in the U.S., according to numerous experienced discus keepers on the simplydiscus.com forum. However, don't know if he breeds his own, or has access to good fry from other So Cal breeders - you could check with him, he'll probably know.
He's a very successful, reputable importer of Forrest discus from Malaysia.
Daly City is in SF, Nor Cal,
not So Cal. Bing Seto, Dick Au both reside in the SF area and have more than few comments and books on the subject.
I've gotten some of their culls for cheap, but they and others here have good stock if you wanna pay for it.
I think CO2 is FAR more a factor and feeding/food in planted tanks than ANY nutrient issues, other than NH4.....which is absent in planted tanks.
Folks worry too much about nutrients and not enough about the REAL killer, CO2.
I'm also not sure that stunted smaller discus are "bad" per se, Bonsai are not bad either and large fish in a smaller tank does not look good either.
Depends on the aquarist goal there...........And folks like to add/cram many fish into a small tank.
I've bred discus, set up massive tanks for them, and measured the planted tank parameters going back 15-20 years now. Myths abound strongly still with plants and these fish.