I am reading a lot of negative things on here regarding spinach and I suspect the big problem with most is they are not using ORGANIC as I have had no problem with spinach and the shrimps mob it and I have never had any deaths. IF you aren't sure then you can easily grow your own from seed on a window sill etc. If you buy it from a supermarket and it is labelled organic then it should be fine, but I would try a very small piece first time. Only takes a couple of minutes to prepare either fr