First of all congrats on the eggs. Second, over the long term you need a lot bigger tank than 3ft for these fish. A 55-75gal tank is needed. The filtration is great and I would love to see pictures of the set up as well.
For the babies, you should see two discus, known as a pair, guarding these eggs. If this is the case, you may have really lucked out and if you are interesting in rearing babies you could look into a set up just for them.
Note that for most all cichlids, discus take few trys to get it right. Watch out that they may be infertile, eaten, etc. If you have no care to raise these babies, let nature take its course and see if any survive.
FW: 1 45gal, 1 40gal, 3 10gal, 3 30gal all community tanks of different species
Sw: 1 55gal, 1 30gal show, 1 29gal show, 1 20gal and 2 10's