I'm a little late to the party but thought I would provide some insight as to what worked for me in the past (25 years ago). Sengalis were a rather uncommon fish then at least in my area and We were able to find several sub adults of differing size and ended up with two females reaching maturity. As those two pairs were separated I started two tens and two 20 longs added lots of floaters and literally filled them with hornwort. I put 24hr lights on them and allowed the plants and algae to flourish. A scoop of mud from the swampy section of the local pond provided a variety of little bugs. Yes I am aware many will freak that I had no idea what parasites' I may have introduced but I believe the good outweighed the possible downside. these tanks just sat and brewed and bred puffer food until the pairs laid eggs. I dropped the water level to 3 inchs and pulled only the plants that wouldn't stay submerged in the 10s and split the eggs between the tanks. I ran a simple sponge with an air stone stuffed in it. This allowed aeration with out current. Once I had fry I began spreading cold shocked Baby brines through out the tank. 3 to 4 times daily. The snails took care of the left overs. I'm sure I lost eggs to the snails but Once again I believe the good outweighed the risk. the fry grew at very different rates and the larger fry were separated to the 20s. With a magnifying glass you could watch the week old fry hunting the Little bugs and wigglers from the pond mud. I believe that is what they call infusoria now. We just called it live water. By the time they were an inch long i was feeding them Cichid and endler fry. From there it was just keeping up on growth and space. I hope this help with the fry rates.
