Try putting the triops under direct lighting, like a incandescent light bulb. You do not need a filter or a heater. depending on where u live, tap water is fine, but just to be safe, use distilled water, do not use mineral water. The bigger ur tank, the lesser the chance of cannibalism. Feed them crushed fish flakes or pellets after about 2 days of hatching. If u want them to naturally spread their eggs, u can use sand but the triops will end up eating a majority of the eggs. Better if u remove the egg sacks manually when the eggs, they will regrow the egg sacks so dont need to worry.