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.

It's day 11 and nothing has hatched, at all. I used the capsules between 4 containers. I wanted to experiment and see which hatched out best. 2 Reverse Osmosis and 2 tap water (well water with a whole home filter system and treated with tap water conditioner). 1 R/O and 1 tap were under a heat light (water temp 82°F) and the other 2 were room temperature (72-75°F). All containers are under a grow light (with my plants). NOTHING, absolutely NOTHING has hatched. When day 14 rolls around without anything hatching, I'm packing up the empty capsules and sending them back for a refund.UPDATE: It is now day 14 and NOTHING has hatched. I just noticed that this item isn't returnable. So, I'm out $15 (taxes included). I just sent an email to Green Water Farm and I'll update if they reply.UPDATE: 03/02/2023They finally started hatching about 2 weeks ago, so it took about 4 weeks to hatch. Not everything, but enough to start a culture if they survive. The ones that hatched were in a small bowl with R/O water at room temperature around 72°F (no heat light). I took advice from an old forum thread from someone who cultures them on a large scale and have been feeding them Sweet Potato baby food. About 1 tablespoon into a bottle of water (a regular sized drinking water bottle) and shake it up. I put about a tablespoon of that mix into the culture every day. They actually swarm to it. I also dump it into my daphnia cultures and they're populations are booming. I mix new food every day, and toss the baby food after a few days. I also top off the bowl with water from one of my Daphnia cultures. Every few days, I carefully siphon out 1/4 water with a turkey baster and scrutinize it for baby Moina and replace the water with fresh R/O water. It'll take a hour to do, lol. Once the babies get a little bigger, I'll transfer them into a larger container with an air pump--no stone--just air line with a regulator turned down to a couple of bubbles per second.I also would like to thank Sprite from Green Water Farms. I reached out to tell them that nothing had hatched and he sent me a new pack of eggs. I'll keep them in the fridge until I need to hatch them.

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!

They are all hatched. Happy purchase.

I followed the instructions to a t. I haven't had anything hatch yet after a week. I will try to adjust some parameters and see if I get a better result on my next attempt. There are plenty of eggs for multiple attempts. I suspect that some batches are more viable than others and that the variance in reported hatch rates is mostly down to this rather than user error.