This pair of discuss has 3 attempts with all eggs eaten up, 1 times with few fry coming out but still eaten up at the end. this video is their 5th attempt. some things that I think it may help: - young pairs are less experienced, sometimes looks like they are not in harmony after laying eggs or frightened, then they eat up all eggs, if your pair only has 1 or 2 attempts, you can looking forward to their next attempt. - water change. I keep a 80% water change everyday when they are in a small 2 feet tank. (water is coming from the top-roof water reserve, which is kept for sometime, and singapore tap water is quite soft). but after they lay eggs, i keep 20% water change everyday. - I put 7 disuss with a clearer fish in the small 2 feet tank, with only on-top filters, not decorations at all(during the time I just moved to my new flat) tank is small but really clean. after the 2 lay eggs, I only remove the sucker fish out and the rest discuss is still in, so the competition is still on in the tank. the pair is still the king. but I remove the rest after the fry came out. just to release the stress level of the pair. - food: I feed them frozen blood worms, washed before feeding and some dry flaker food. they have enough food and looks healthy and strong. - no extra lighting, I put the tank near my rear balcony, there is no direct sun light on the tank, so the fish enjoy the nature day-night cycle. - a heater to keep the temp 28'C at night - some luck ;) My 40+ young discus only has 3 survive now.(1 big male, 2 females) and I am waiting for their 1 attempt...