Raising mealworms?? Tips ?

Ultum4Spiderz

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Bone-dry coco fiber. I added a little used millipede substrate one time but that's not really needed. The coco fiber should serve just fine for your substrate.
I had issues using coco fiber or topsoil because it would mold when I place veggies in there for the meal worms to eat, and it’s hard to separate them from soil. Two Beatles already died unable to to flip back over, how often should I try to feed the Beatles?
 

FlamingSwampert

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I had issues using coco fiber or topsoil because it would mold when I place veggies in there for the meal worms to eat, and it’s hard to separate them from soil. Two Beatles already died unable to to flip back over, how often should I try to feed the Beatles?
I don't put food directly on the substrate, I would recommend using a large cap from a jar or something like that and putting the food on that. I use a 3d-printed cap-like thing that I had lying around, and I've used a large salsa container cap about 1.5-2" in diameter and 1/2" tall before with no issues. Even the small mealworms are able to climb it, you can bury it a bit in the substrate or place a leaf as a "bridge" into it and they will climb in/out. In the enclosure, I have a piece of cork bark in one corner and I've scattered leaf litter across the surface. The beetles can grip onto this and I believe they lay their eggs on it too. If I forget to feed them they are able to eat the leaves so that's a nice consideration as well. I keep my larvae and beetles together in one container, the only thing is you must check every once in a while for pupae because both the larvae and the beetles WILL eat them after some time (guess they're very high in protein and juicy?). I took one of those mealworm cups you get from a pet store, cut a hole in the side for the beetles/larvae to use as an enclosed hide, and I place any pupae I find on the top. I textured the side with a knife (you should be able to use sandpaper as well) and when the beetles emerge they climb down on their own. Because it is wider on the top than the bottom, it's difficult for any emerged beetles at the bottom to climb to the top to eat the pupae, and I've never seen it happen.

Another word on the substrate, I've noticed that the mealworms raised on coco fiber and fed fresh veggies (+ the occasional helping of protein pellets) have a smoother, cleaner, almost ceramic appearance with more vibrant colors and greater activity. Mealworms I've gotten from pet stores in that flaky stuff seem to be more lethargic, duller, and sometimes have issues with frass getting stuck to their behinds which can lead to death (I've NEVER had any issues like that with my coco fiber mealworms). The adult beetles also seem to live longer.

I can add pictures of my setup if you want. I seem to have waves of growth and recession within the culture, but they have been producing mealworms for multiple years with no issues.
 
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Ultum4Spiderz

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Honestly I throw in some food whenever I notice their food dish is empty. I have dried leaves in there so if you ever wait too long they just eat that.
Any idea how big they are supposed to get before pupating? I got a few getting large. One pupa for size comparison. IMG_7193.jpeg IMG_7192.jpeg
 

FlamingSwampert

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Any idea how big they are supposed to get before pupating? I got a few getting large. One pupa for size comparison. View attachment 469369 View attachment 469370
They seem to pupate around that size. A sign of a mealworm nearing pupation is that it doesn't move around for a while unless disturbed and lays on its side in a slightly bent shape.

On an unrelated note, I have discovered that mine do not like blackberries very much. I don't know if it was because the berries weren't extremely fresh, but they don't swarm it like they do other foods and I just seem to nibble on it from time to time.
 

Ultum4Spiderz

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They seem to pupate around that size. A sign of a mealworm nearing pupation is that it doesn't move around for a while unless disturbed and lays on its side in a slightly bent shape.

On an unrelated note, I have discovered that mine do not like blackberries very much. I don't know if it was because the berries weren't extremely fresh, but they don't swarm it like they do other foods and I just seem to nibble on it from time to time.
Ant invasion of a small number of mealworm pupa, some aren’t forming correctly were easy prey . IMG_7891.jpeg IMG_7890.jpeg IMG_7889.jpeg
 

FlamingSwampert

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Ant invasion of a small number of mealworm pupa, some aren’t forming correctly were easy prey . View attachment 471743 View attachment 471744 View attachment 471745
Sorry to hear that! Occasionally the beetles fail to emerge properly, but if many of yours are, they could be dehydrated. The issue is that the pupal skin gets stuck on them and/or they cannot pump fluids into their unformed wings, preventing them from properly hardening. I would recommend feeding fresh and hydrating veggies, as well as making sure they aren't in an extremely dry area. Don't mist them, but I believe keeping them close to things like cork bark and coco fiber helps because it absorbs humidity in the air which is slowly released without making anything moist, but I'm just guessing.
 

Ultum4Spiderz

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Sorry to hear that! Occasionally the beetles fail to emerge properly, but if many of yours are, they could be dehydrated. The issue is that the pupal skin gets stuck on them and/or they cannot pump fluids into their unformed wings, preventing them from properly hardening. I would recommend feeding fresh and hydrating veggies, as well as making sure they aren't in an extremely dry area. Don't mist them, but I believe keeping them close to things like cork bark and coco fiber helps because it absorbs humidity in the air which is slowly released without making anything moist, but I'm just guessing.
It happened a lot too the larger worms.
I feed them veggies multiple days weekly.
you can’t mist the pupas or they mold . With a lid on . wish I had one of those things I can’t separate mealworms from the beetles :
🪲 IMG_8285.jpeg IMG_8286.jpeg IMG_8287.jpeg
 

Ultum4Spiderz

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Has anyone had any experience with the bug factory mealworm kits? I was thinking about raising some mealworms for my Ts but I'm not sure if it's worth it for only 16 tarantulas.
Only way to know is try it out , I was too broke to buy it someone suggested that.
 

FlamingSwampert

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Has anyone had any experience with the bug factory mealworm kits? I was thinking about raising some mealworms for my Ts but I'm not sure if it's worth it for only 16 tarantulas.
Rus of aquarimax has a review on his youtube channel I believe

It happened a lot too the larger worms.
I feed them veggies multiple days weekly.
you can’t mist the pupas or they mold . With a lid on . wish I had one of those things I can’t separate mealworms from the beetles :
🪲 View attachment 473286 View attachment 473287 View attachment 473288
Wow, those are a lot of fails. Maybe your room as a whole is too dry? Maybe you can make a sterile container for them, place a small container in the middle with holes on the sides, and place damp moss in it and just mist it there? Maybe that could work like a little humidifier? I'm not sure, just thinking as I write this.

On another note, I'd recommend deepening the substrate in your enclosure, unless the pics are just of you sorting them. Deeper substrate allows the mealworms to burrow more and avoids frass from piling up.
 

Ultum4Spiderz

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Rus of aquarimax has a review on his youtube channel I believe



Wow, those are a lot of fails. Maybe your room as a whole is too dry? Maybe you can make a sterile container for them, place a small container in the middle with holes on the sides, and place damp moss in it and just mist it there? Maybe that could work like a little humidifier? I'm not sure, just thinking as I write this.

On another note, I'd recommend deepening the substrate in your enclosure, unless the pics are just of you sorting them. Deeper substrate allows the mealworms to burrow more and avoids frass from piling up.
I can try it yes .👍
Can I just grind oats for substrate? I already killed one blender blade with cat and dog chow . Or leave them ungrounded?
 

ladyratri

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I still have an out of control lesser mealworm explosion in my cricket bin... It's just dirt, and the cricket chow spilled into the dirt, and I remember to water it once every week or two 😅

To be fair, they also eat my leftover crickets...

Clearly at some point I should try real mealworms lol.
 

FlamingSwampert

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I can try it yes .👍
Can I just grind oats for substrate? I already killed one blender blade with cat and dog chow . Or leave them ungrounded?
You can use whole/ungrounded oats, I did in the past, but I had issues with grain mites (not saying that you will), which is why I just use coco fiber now.
 

Tbone192

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The only real downside as to why I don't breed mealworms anymore is because it can attract grain mites. If you get one small grain mite into that colony, they'll explode into millions within a couple of days. I've dealt with too many grain mite infestations to the point I told myself to never try to start a colony again with mealworms.
Trick is to keep feeders somewhere dry and most importantly away from your T's. This way even if a breakout occurs, the lack of moisture will limit their spread and your T's won't get infested. I have had mites too many times even before keeping T's when I had my bearded dragon.
 

FlamingSwampert

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Trick is to keep feeders somewhere dry and most importantly away from your T's. This way even if a breakout occurs, the lack of moisture will limit their spread and your T's won't get infested. I have had mites too many times even before keeping T's when I had my bearded dragon.
That's a bit tricky if you live in a moist area. Thankfully, I've found that coco fiber is an excellent substrate as long as you remember to feed your mealworms.
 
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