We have only had our tank about 4 months and our shrimp have had approx 10 babies. There is room as we under stocked but if they keep breeding what on earth do we do with them. We have danios and tetras and it seems a very happy tank currently.
We only bought the shrimp as an afterthought but I almost prefer them to the fish as they are hilarious.
They are red cherry shrimp, we also have a couple of assassin snails who are oft seen rolling around together and wondered if they will also breed. All this free love it's like Woodstock 