if your tank is heavily planted and there is lots of hiding places, the shrimp should be ok. I don't think betta's will eat shrimp, but they might harass them.
As for which shrimp, I think that red cherry shrimp are the easiest to keep. They scavenge around and eat what they find, but you can supplement that with shrimp pellets
I asked this very question about Amano shrimp at Roger's a couple of months ago and their answer was 'yes'.
Amanos are very easy to keep. I feed mine Shirakura shrimp pellets that I got from Pat. Neutral pH. They are doing fine, and probably doubled in length since I got them (from Pat, too). They're not as colourful as other shrimp of course but still a lot of fun to watch. And they help a bit with algae. I love mine.
I agree that red cherries are probably the easiest to keep, but I would be worried about keeping my RCS with betta. I've heard stories where even if a betta doesn't eat the shrimp outright, they can still attack and kill them. Of course, this does depend on the betta, but I think that having a couple of amano shrimp is a much more feasible option, as they get much larger than red cherries.
Thank you, everyone. I really appreciate having such a reliable & quick source of information. April had amanos in (cherries arriving tomorrow) so I got three from her and put them in my tank. (It's a very well planted tank with some rock as well.)
I hope that the shrimp survive. If they last 2 months, I hope to put 2 or 3 cherries into the female betta's 12 gallon tank. That is a very well cycled tank and at Stuart's suggestion I pruned it last night. If they don't survive, then I won't try any other shrimp.
Crazy72 -- I have shrimp pellets! I didn't know that they were FOR shrimp. I thought that they CONTAINED shrimp. As in, a tasty appetizer for the fish crowd.
I've kept ghost shrimp with my betta. Had them for the longest time without either of my bettas taking much notice of them. Until last week, when I noticed I had a very full looking betta and was one shrimp short It was a big one too!
I never fed them anything specifically. They just ate the junk off the bottom, and the last two got smart and would swim upside-down at the surface and snag flakes.
So right now I'm down to just one shrimp in the whole tank, and I'm not sure if I'd choose to get any more. They're pretty nasty little buggers, and pinch the betta's tail O_O
Glad you asked this Maureen, I just bought 20 baby cherry shrimp which are veryyy small(4-9mm), put them in a 1 gal eclipse I have for now, as most are small enough to fit in my Neons mouths even. I have a Betta in everyone of my tanks and had the same concerns as well, plus my biggest tank has some larger black skirt tetras which I'm sure would love the shrimp lol so I'm glad you posted this. Figure they will definitely be bigger than everyone's mouths before introducing them to the communities. Glad to see you got some to work with yours, hope they are still alive as I see this thread is over a month old. Can't wait till mine get bigger , they are so entertaining to watch, I see why everyone has/wants some.
lol about the shrimp pellets, I can see where that could be misleading