RCS seeks survival strategies for community tank

I was wondering if anyone out there had any thoughts on how to keep red cherry shrimp alive in a community tank.

I bought 30 RCS about two months ago for a 75 gallon low light planted tank. Current stocking consists of 5 turquoise rainbows, 4 gold barbs, 13 harlequin rasboras, 5 yoyo loaches, and a SAE. There is plenty of driftwood with lots of nooks and crannies. Planting consists of several java ferns, Anubias nana, water wisteria and a carpet of Cryptocoryne wendtii (which hasn't quite filled in yet).

The shrimp do alright as long as they stay near holes in the driftwood to retreat into, but any time they go for a swim it triggers an instant feeding frenzy. One rainbow swam around for about 12 hours with half a shrimp hanging out of it's mouth before it finally was able to swallow it.

I have since added a few patches of java moss for them to hide and graze in, but I sense a slow and inevitable eradication of the RCS clan. I don't plan to buy any more shrimp, but I wondering if there is anything else worth trying to make the current batches' last days more numerous and/or more pleasant. Thanks.

Thanks for the replies. I don't know that the wife would be thrilled to have another tank in the house (even a small breeding tank for shrimp), so I guess the survivors will have to make do with their current set-up. Even at $1 each they are fairly expensive snacks... hopefully the fish appreciate it.

P.S. SAE = Siamese Algae Eater, about the only fish in the tank that does not harass swimming shrimp.