The plastic is self made by my dad. He used it in the 1980s for breeding other catfishes. I have it stolen.
In this case it´s really easy. Feed them good with bloodworms and make some large water changes. Then they will do it. The fry are also easy to keep alive. If they are all hatched i put a hand of sand to the tank. After three days i start the feeding with decapsulated brine shrimp, frozen Cyclops and microworms(right translation? i don´t know). Regulary water changes (best daily) are good for growing up.
I did not play with water chemistry or temperature. Temperature between 24 and 28°C are fine for the breeding.