GreenWaterFarm Moina Macrocopa Eggs (Water Flea) Live Fish Food for Hatching and Culture Suitable for Feed Betta Fish

I’ve been using these eggs to grow diverse microfauna for my fish tank and have a fairly good success rate with these eggs hatching. Heat, light and oxygen are the key. I use a small glass jar, put about half the vile/pill of eggs in, cover with an inch or two of warm tap water and put the lid on, place on a warm pad used for seeding plants and make sure they are near a light source (window/lamp/tank etc). Not too much water is needed because the heating pad is warming the jar from the bottom and too much water will be harder to keep warm as well as to oxygenate. Swirl the jar a few times a day, you should see bubbles. Once they hatch drop in a small amount of food like fish or algae pellets. Mine usually hatch in 1-3 days! Very quick. The water in the jar will evaporate slowly so add small amounts of water as needed.

I put these in water yesterday afternoon and tonight I see lots of them have already hatched! I filled a small 1 gallon acrylic tank with distilled water and am using a nano heater set to 78°F. This was a tank I’d just used to grow rotifera in and didn’t scrub clean so the sides still had biofilm and remnants of yeast and chlorella. I saw the video of the guy who trapped the cysts underwater and complained they didn’t hatch. Don’t do that. They float. If any get stuck on the side of the tank just hose them off with a pipette. Idk how beneficial it was but I did initially only fill the tank 1/3 full and then added more water in 2 more stages 2 hours apart as I’d read that helps the hatch rate.

This tank is over a year old and it's been a stable tank with no new introductions of fish, plants or anything it is also the only tank I have. After following the instructions provided I ended up with hardly any actually hatching in a small container in my tank that would allow them to grow and I could feed them separately from the rest of the tank yet I hardly got any to hatch from both provided canisters.Once I noted they were unlikely to produce many I just released what I had into the tank to allow them to be eaten and perhaps survive.Now here I suddenly have a bloom of hydra forcing me to perform extra actions to stop them before they get out of hand. Would not suggest getting them if your tank is stable and doesn't have any hydra.

The media could not be loaded. I saw a few reviews saying these eggs didn’t hatch, but I can confirm: they absolutely do hatch if you follow the right setup. I had Moina swimming around in less than 24 hours!Please read this before you try—it will save you frustration and wasted eggs:1. Use clean, dechlorinated tap water. Avoid pure RO or distilled water—they lack essential minerals. Tap water is perfect unless your water is from a well or has very high pH. If your water is too alkaline (above ~8.5), you may have trouble hatching.2. Water depth: Keep water at about 3–4 inches deep. Shallow water improves light penetration and oxygen exchange.3. Light is critical: Place the container near a window with good indirect sunlight, or use a daylight-spectrum bulb (white light) about 3–4 inches above the container. Aim for 12–16 hours of light daily. I used an old aquarium white LED light. Yellow light is not as good.4. Temperature: Around 75–85°F works best. Room temperature worked well for me.5. Let the eggs float: Floating is normal and helpful! Don’t try to sink them. The eggs hatch best near the surface with light and warmth.6. No aeration needed: I didn’t use any air pump or aeration, and they still hatched fine. Aeration might help, but it’s optional.7. Don’t overdo the eggs! I used an entire capsule because of some other reviews, and it was way too much. I wish I had not done that. Half of one capsule is plenty to start a good culture.8. Be patient: Hatch time is usually 24–72 hours, but I saw mine start moving in under 24!9. Feed once they hatch: Use chlorella powder or pure spirulina powder, dissolved in water. Start with a very small amount—just enough to lightly cloud the water. Don’t overfeed!I’m really happy with the results. If you follow these steps, you should get a great hatch too. Don’t let the negative reviews discourage you!

I was excited to get moina for my fry, since I have a thriving colony of daphnia that I feed regularly to all my aquariums. I regularly hatch brine shrimp as well for variety for all the fish. My first container had zero hatch. I will split the next one and try hatching some in green water, some with heat as I read in another review. Not sure about following directions on box again. Will give it a couple of weeksUPDATE- second try in green water was excellent. Takes longer to hatch than expected. I would buy again, but only put the eggs in green water to hatch. I did not use heat either time.

The media could not be loaded. Has been so fun and easy to do! I put them in a 6 gal corner tank with a water heater and sponge filter. Lots hatched on day 3 (pic) and tons more have hatched and grown on day 10 (vid). They are all over the place and so fun to watch. I put a little bakers yeast in once a day and they have taken off! Very pleased so far(pic of capsule before adding) - I have only used the one capsule so far. I did add them into a breeder box because I was worried the eggs may get sucked to the filter, but they float so that wasn’t an issue.

Takes more time than I thought. Quality is not what I expected but all seems well. Really tiny critters so far waiting to see adult size.

All eggs hatched within 24 hours in aquarium water. A light was used on one jar and none on the other, both hatched around the same time. No airstone needed