Hello and welcome to the hobby, and guild XD
My mom always hated small fuzzies, unless it was a cat, so that's why it's always been fish for me since I was a kid.
Well, lets start. What do you mean with a 'turtle that has rosey reds'?
You have the shrimp with the turtle? I'm not sure if this will work for the shrimp, since turtles are omnivorus, it might come to see them as a snack, well the red cheek turtle would anyway. I only had that species for a short while, but they are quite enthousiastic eaters, if not over enthousiastic. I've olso heard that some turtles may n** and scratch at fish, so even if plecos are armored fish, caution might be advised.
Then again, I don't know much about turtles exept that the one I had looked cute, produced a lot of waste, and rearanged the rocks in the aquarium so often it finally broke the glass. Never mind that it loved swimming into the glass too XD
Not sure if aquatic plants can survive apple snails, but there are plants that can survive golds. The 2nd post on this page gives a whole list of plants that can be kept with golds:
http://www.gaiaonline.com/guilds/viewtopic.php?t=9105897&page=2. I did live in the tropics back then, so some plants may not do so well in colder klimates, so I suggest just experiment. Also, the more plants you have, the less chance you have of them being killed by eaten.
Since you have multiple aquariums you can also try swiching the plants around to give them some downtime. When one of my plants looked particulary sad I would take it out and put it in my guppy breeding tank. Toss in a few drops of plant grow stuff and they will liven up quickly. Often in time to swich with the next victem of goldfish molestation.
If you feed your goldfish lots of greens they are also less likely to munch on plants. Here's a thing I was working on concerning fish'snacks';http://www.gaiaonline.com/guilds/viewtopic.php?t=11741473
Since both golds and apple snails are large waste producers make sure you have a goodfilter there. It's a great idea to get your fish a companion though, golds are very sociable.
Ah guppies, they get pregnant so easilly, but in my experience it's a headache to get the young to reach adulthood. Unless you have more then one tank so you can keep the parents and the young separate. I also heard that aquariums that are densly planted have great survival chances, but since I don't like playing hide and seek with my fish all that much I never had more then 1/3 of the tank planted. I never had much success with getting the majority of a guppy's drop to adulthood. Goldfish and Angelfish worked better for me.
I've never been quite into guppies, but other people in the guild are. Here's some threads concerning guppies:
http://www.gaiaonline.com/guilds/viewtopic.php?t=4042285http://www.gaiaonline.com/guilds/viewtopic.php?t=4395047http://www.gaiaonline.com/guilds/viewtopic.php?t=8853669Hope I could help a bit with the info load, and I hope more people will pop in to help you along. I've got no idea how active this guild is now a days. I just came back today after a few months absense. But I warn you, It's often quite slow XD