What size of tank do you have them in and are they on their own? I have corries in most of my tanks and I see the odd fry that has managed to survive, but most inevitably get eaten. I'm not trying to breed them but I have a couple of spare tanks atm and it might be interesting to try this.
Guppies and rams are unlikely to both thrive as they have much different requirements. All the other fish you mentioned prefer softer water , except for guppies.
I think the easiest route would be to leave the snails and be careful feeding.
Of course if your snails don't get much to eat, your shrimp won't either unless you can think of creative ways of feeding them.
I love beachcombing for wood and other stuff for my tanks. Never thought of taking a jigsaw with me. I often find big logs that are far too big for my needs.
Either the glofish or the livebearers will probably be suited to your water, but it's unlikely both will be. Livebearers will be more comfortable in water that is 10 GH (general hardness) and over, Softwater fish (like most of the tetras and south American cichlids will do better in water under...
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This is my Juwel Vision 260. Fish include 2 large male angels, 1 small female who never grew for some reason. about a dozen rosy tetras, white cloud mountain minnows, 7 big fat SIA's 3 Honey Gouramis, 3 different shoals of Corydoras (about 25 in total) and a pair of Apisto McMasteri. Hardscape...