Rotifer Culture Keeps Crashing

Rotifers should be fed constantly. At work we use a bubble magus pump to keep a constant supply of food. Before using the dosing pump, we would feed a large amount every so often as the water started to clear. Since we started feeding 24/7 the rotifer densities are about 1000-1500/ml. The dosing pump is the only thing that has changed and its made all the difference. They are also in a room that is constantly 26-27 degrees Celsius. Hope that helps!

I feed them every day. Enough to tint the water so I can't see the bottom of the bucket (I use a white plastic bucket). I feed Nano paste (from Brine Shrimp Direct) and Roitgrow (from Fish4You). Air must be at a rolling boil.  They must religiously be harvested daily 25% to 50%. I do a 50% water change weekly (not necessary that often, but it helps keep the ammonia down in larvae culture).I keep them cold at 60 to 70 F ( the temp on the basement floor).  They are denser at temps of 75 to 80 F but the culture is easier to crash at warmer temps. They don't need a light cycle just ambient light from the room.

The tips I posted are for a high density culture. You can keep a low density culture doing about the opposite. You can also restart a crashed culture.  

I have two container, one with bubbler and the other are without, the without seem to do better than the one with bubbler, I just have it sit on the table and tint the water medium green. I usually dump out half of the water and fill it with half new water and it seem to work and have not crash yet, alway make a couple jar beside to make sure you have back up it the main one crash. So far I have not crash any.

In our culture, we ALWAYS put a little prime in there and keep up on water changes.

I just started a culture today. Hope mine don't crash. I'll post if I have any issues or anything.

How many cultures do you have going? Its always best to have several because no rotifers obviously means no clownfish babies, lol. I never had any trouble with mine and I had five 5 gallon bucket cultures going at a time. I did use different cups, screens, hoses, stir spoons, etc. for each culture to make sure to never cross contaminate. Also, maybe a small water change every couple weeks or so and keep the a tinted. What Algae are you using for your rotifers? That could be making all the difference in the world with the film on the top.