This is in Russian but you can get the gist of what they're doing and the quantities produced.
I might give that method a go too actually,thanks for that
My worry with adding them to a Moina culture was the water quality deteriorating much quicker but I think I will give that a try as well.
I think it is because Cladocerans (Daphnia, Moinia etc) filter particles from the water column by size, so very small individuals will get extra Bacteria, Rotifers & Protozoa etc generated by the worm culture.I thought @louis_last mentioned a beneficial relationship in that the Deri worms somehow generated food for the Moina.
That's exactly it - that just like infusorial snails they seem to convert solid foods into, and then pass in their waste, a lot of microorganisms that the moina can feed on.Hi all,
I think it is because Cladocerans (Daphnia, Moinia etc) filter particles from the water column by size, so very small individuals will get extra Bacteria, Rotifers & Protozoa etc generated by the worm culture.
I think the same applies to keeping a Ramshorn snail with the culture, as well as janitorial duties it will generate food organisms in the water column.
They definitely can, it just may be that they reproduce faster on grains - or even just that grain flour is cheaper than algae wafers. I've only tried oat flour so far with the ones alex sent me.Oh right - I’d read they could be fed on algae wafers and fish food - I figured that would be good as the snails could eat it too.
I am having a decent level of success on growing Chlorella with the dry salt ferts. It does seem to take longer to get a high density than with the Fish Mix, though I may simply not be adding enough ferts, but I'm happy the dry salts work to grow Chlorella just fine. I also tried seeding a 2 litre bottle filled with nothing but tap water and got a decent amount of Chlorella growth just off that, so my tap water obviously contains a fair amount of ferts also.
I tried growing it with Tropica specialized and miracle grow slow release pellets but without great results. It seemed to grow a bit but was a much more pale and never got to very high cell densities.
What I'm doing at the moment is growing in strong fish mix which seems to result in an obscenely high cell density, then once the 5L bottle is fully populated I turn off the air and don't agitate it at all for 48 hours and all the chlorella settles to the bottom then I just siphon out all the brown tinted water, refill with fresh clean tap and start the air again. All the chlorella goes back into suspension but without any wierd residual water chemistry and I then feed from that bottle while the other one is growing.
[QUOTE="Wookii, post: 646335, member: 18929"]
My Moina tank is still running, without any Moina in it. I now have a thick layer of what I can only assume is Chlorella on the base of the tank - and the water is still pea soup green. I'm starting to think my issue with the tank previously was two fold - firstly I was inadvertently adding ammonia for the Chlorella/Fish mix culture that hadn't been used up by the Chlorella, and that caused the death of the Moina and the snails to try and exit the tank, plus a possible bacteria bloom. However I also think that the combination of very high light, and my tap water for water changes, was causing chlorella to bloom in the tank at the same time - obviously faster than the Moina could consume it.
The sponge filter has been running since my last update anyway, and I have no more ammonia, and the snails seem happy enough. So I've now hatched another batch of moina from the cysts I have, in a one litre shallow container, and I'm feeding them up on the Chlorella cultures I have, and they seem to be growing and breeding well, so I'm going to introduce most of them back into the Moina tank and see how they get on. In theory I shouldn't need to fed them until their population reaches the point that they eat up all the Chlorella that's already in the tank and clear the water (?).
Ceriodaphnia are still very much outcompeting the moina in my main culture and I still can't figure out why because I've never been able to get them to really take off in their own cultures. I've started a seperate clean moina culture that isn't contaminated with ceriodaphnia now.
Hi @louis_last and @MirandaB how are your dero worm cultures going? I've seen that Alex is selling them again but at nearly £20 for a starter culture do you think they are worth it? I've currently got cultures of banana worms, grindal worms, black worms, daphnia, moina, brine shrimp and Asellus aquaticus.
I'd like to get away from flakes/pellets as they all seem to include some amount of wheat/soya/potato as a binding/filler but I'm a bit uncertain about the nutritional value of some of the cultures I have. I've read various values mentioned online so do you think dero worms add something or are better in some way than the others?
I've only had them a couple of weeks but they seem to be ok. There was a big die off in first week but now there are lots of tiny ones. I'm poly-culturing them with the black worms and asellus aquaticus. I've also got them in with some Psuedomugils luminatus fry and red cherry shrimp. My hope is that feeding the shrimp will produce infusoria that will feed the moina and the moina will feed the fry. It seems to be working so far and I'm hoping that it will allow me to stop hatching brine shrimp.+1 on this, I was thinking of adding dero worms to my cultures this summer too. You're certainly covering a lot of live food bases with that selection @ScareCrow - how are you getting on with the Moina?
I completely failed with about 6 separate attempts at culturing Moina long term indoors. My most successful culture was an out door one in a 60 litre plastic container with several handfuls of oak leaves on the bottom combined with some ferts to promote algal growth and a solar powered airstone. That gave me several months with of feeding until the colder weather kicked in.
Thanks for your reply. I think I'll not bother then as I don't have anywhere I can keep them warm where smell won't be a problem. Shame though, like you say a clean source of tubifex like food would be good. I'll stick to freeze dried tubifex instead.I'm still undecided on how worth it the Dero are as they're a bit of a faff....need temps on the warmer side which is difficult if you're culturing them in shallow tubs on sponge and the smell means it's a no go in the house lol.
Nutrient wise they're not going to be much different from Tubifex although obviously you know your culture is clean whereas Tubifex origins can be a bit suspect.
Thanks for sharing.Would this technique not work? The guy seems to be culturing them in a sealed tub/jug and feeding them algae wafers, changing the water regularly. You could even add a little heater if need be?
Back in May 2015, i managed to obtain a starter culture of microfex (aka dero worms) from J'adore at the Aquatic Quotient forum. Microfex...www.urbanaquaria.com