Hello! I have a garden snail that had lots of babies and was hoping for some advice please! :) I want to make their enclosure as comfy as possible for them but I don't know how. Do they prefer dark environments? Hidey holes? What kind of substrate is best? Etc. Thank you!
(I'm in Southern California)
Congrats on your snabies! Firstly I would not take any substrate or decor for the tank from outside unless you want a lot of hitchhiker creatures in your snail tank. If you do, you'll want to bake it first.
A standard 10 (or larger) gallon aquarium with a mesh lid works great, but you'll want to modify the lid to cover most of the mesh to keep the inside humid. I just bought a squeeze tube of silicone and attached some plastic sheeting inside the lid to cover about 75% of the mesh.
Substrate can be any sort of animal-safe soil-like substrate - so soils meant for bioactive reptile and amphibian enclosures or for isopods. Repti-soil, Creature Soil, organic potting mix, etc. I personally have my snails in with my millipedes, and use a combination of eco earth and Josh's Frogs milli mix - can't recommend milli mix enough! Josh's Frogs ABG mix or isopod substrate would also be appropriate.
No matter which soil you choose, it should be 4-5 inches deep both to hold humidity and for burrowing. 10 quarts will fill a 10 gallon aquarium to the proper depth.
As for decor, I would avoid rocks since snails WILL climb the glass and other decor and probably will fall off from time to time. Rocks can shatter their shells. I would stick to wood - any aquarium safe wood is fine. Cork bark, mopani, spider wood, etc. I'd also recommend some dry/dead reptile-type sphagnum moss to keep up humidity and for nibbling, and some kind of leaf litter - I buy bags of dry/brown live oak leaves on amazon for pretty cheap. My snails don't seem to hide in holes or crevices much - when they're not active, they mostly hang out on the lid or the top glass of the tank.
You do not need lighting or heating unless your house gets particularly cold in the winter - they may be less active if it's too cold. You can put a low watt reptile heating pad on the side of the tank to keep the temp up around 70+ if need be. They are primarily active at night, so if you want to see what they're up to, a small light that doesn't give off heat near the tank would be okay.
Most important is humidity. Get all of the substrate and moss damp as you put it into the tank with distilled water. I use a reptile mister bottle and buy gallons of distilled water at the grocery store. They last a long time so not a big investment. You'll also have to mist the whole enclosure probably daily, maybe twice daily. It should be moist and humid but not sopping wet. Don't let the substrate dry out entirely. Occasionally you may have to stick your finger into the soil to make sure it's staying damp under the surface.
And finally, snails need calcium for their shells! I occasionally dust the top of the substrate with powdered reptile calcium, or you can throw a cuttlebone in there for them to nibble on.
Here's a list of safe/not safe foods for snails.
If you ever have more questions about setup that I didn't answer here, feel free to IM me! Happy to share creature keeping tips.