Yep, that is pretty much how you make them. Really easy, really. Nothing to it and you save a lot by making your own.
The only problem is some will still eventually make their way up the substrate especially after uprooting plants, so unless you don't mind them in sight, then go for it.
20 gallon - Sulawesi Golden rabbit snails/Japanese Trapdoor snails/RCS/Marbled crayfish tank
55 gallon - Rainbowfish Dutch scape low-tech planted tank
250 gallon - Community Tiger Oscar/Red hook silver dollar/Silver dollars/PB Jack Dempsey/Clown loaches/Tinfoil barb/Roseline sharks/Bala shark Monster fish tank