Its been a long year and between family health problems and summer, I have not tried to raise any fry since January. Right now I have three pair laying, skunks, black Darwins, and ocellaris. I have time right now to raise a batch or two and my rotifers arrived today. The black pair will have a hatch tonight.....just in time. I am trying the new and lazy method of raising the fry. NO WATER CHANGES. If you look at my BRT you will see it has a bottom input for water and an overflow out the top. This allows new water to enter just below the bubble ring and the upwelling circulates it. It then must pass through the filter on the overflow and return to the sump. Rotifers and fry stay in and water from the main system is dripped into the BRT on a continuous but very slow rate. I have tried to set it up so that the 7 gal in the BRT is turned over twice daily. The amount of waste coming from the BRT will be dissolved organics and ammonia. The overflow filter catches the fine particles. By contrast, each of my breeder tanks gets fed 3 times a day with feeders and once a day a feed Fertility Frenzy. That's a lot of food and it is well handled by my oversized ATS and the size of the system. I think it will have a very small effect. I have had 8 breeder pairs on this system before and I don't see the amount of food going into the BRT being anywhere near what two adult breeding fish will consume. We will see, I have to go unpackage my rotifers from Reed mariculure.