They can be tank bred, i havnt done it myself yet because of lack of space and breeding anything in the tank theyre in would be impossible.
But heres what i could dig up for you;Spawning pairs are conditioned in the normal manner,a period of fasting followed by heavy feedings of live foods followed by large regular water changes.The spawning is done over night and 40-60 sticky eggs are attached to the glass which the males guard,in multiple spawnings the eggs are always stuck in the same spot.The eggs have a low yolk content and fry hatch within 10 days.The male helps the fry from the egg casings and will care for the brood.Raising the fry is difficult, water needs to be soft (5-10 dGH) and pH neutral,fry will eat algea and liquid fry foods.
Hope this helps,i plan to try this out my self one day (if i can get a bigger place than our tiny flat) so let me know how it goes if you attempt it