Has Anyone Grown Daphnia In A Tank With Just Shrimps And Plants?

[jarthel]

the fish (threadfin rainbowfishes. about 40 of them) will be added much later. and I believe threadfins diet include live daphnia in the wild. I want the threadfins to eat the daphnia as snack. so hopefully enough daphnia can remain to maintain a stable population.

any thoughts?

thank you

 

[lexusalan1]

far from any kind of expert but i would have thought that the fish would just eat and eat until they have all gone.
ive heard of people breeding treats like that in seperate containers and feeding to the tank as and when is required, but i wouldnt have thought they would have the time to reproduce before they were eaten.
like i say im no expert so it could be that im way off the mark.

 

[OldMan47]

If you can grow green water algae, the stuff that makes your tank look like it is full of pea soup, you will have success growing daphnia in it until they eat all the green water. My attempts at continuing a daphnia culture with artificial foods has been a total failure in the past but they did well as long as I was able to maintain the green water. Be aware that the most effective way to clear a tank of green water in just a few weeks is to seed it with daphnia, so that food source will not last long. Green water is easy if you have some nitrogen in the water as plant food and provide tons of light for long periods each day. My best ever was when I placed a 150 gallon tub outdoors, dosed it with ammonia as if I was starting a new cycle and seeded it with some existing green water. The whole 150 gallon tub turned a solid green in about 2 weeks. I could only see my hand in it up to about 3 or 4 inches deep in broad daylight. The daphnia had almost cleared it a few weeks after I put some in it.