test ph...in high ph i have seen angel eggs not adheasive. You should shoot for neutral to slightly acidic for angels. The eggs should stick to just about anything. I agree with the advice it could be just young kids figuring it all out. 3-5 spawns is what it usually takes for me with discus and angels to figure it all out. Feed em well on high protien foods...variety i think is more important than any single food...bloodworms, brine, occasional earthworms, occasional black worms, daphnia, mosquito larve, mysis, ground krill,and my personal favorite cyclops. If eggs don't start to adhere (7-10spawns and ph accounted for) I would not breed them since you don't want to pass on that trait. With my baby angles and discus i feed deformos ruthlessly to my red pikes...blackworms and earthworms fatty and bad for liver if fed too much...did dissection in a lab analyzing livers of dead fish from the inside out. Blackworms have given my discus tapeworms and gyradactyl but they really are worth the risk since both are so easy to fix. (look at a blackworm under microscope and you will be blown away at number of gyrodactyls in field of view)
lilydog