Hi, if you look at my stocking plans in my profile, you will note that I am currently planning on ultimately getting red cherry shrimp in our 30 galling tank. Yes, I know that we would need hiding places for them such as java moss. How much java moss would one need for a colony of 30 RCS plus possible fry etc.? I also know that I will need to cover the filter intake with a sponge or at least a stocking (I may be getting a new better filter before getting the shrimp too). yes, I know the shrimp are a risk - my stocking plans are otherwise very conservative thus far, and the shrimp are the most risky part of the plan. When we went to the pet store the other day to acquire our bristlenose pleco, my six year old son admired the ghost shrimp, and thus he was wondering if we could get ghost shrimp either in addition to or instead of red cherry shrimp. I did a bit of research and discovered that ghost shrimp are more aggressive and may kill red cherry shrimp, correct? Also while ghost shrimp are more available in pet stores, red cherry shrimp are less sensitive / more hardy, right? So given that, I am tempted to explain to my son that red cherry shrimp are a much better option for us than ghost shrimp, and that we could not have both. However, I wanted to verify with you first whether you agree with this, and whether you have any additional info to add on this subject. Finally, thus far I am planning on java moss as the plant for the shrimp to hide in, but if you have alternative suggestions, please let me know. We have sand substrata and two fluorescent light bulbs that are 18 watts each in our 30 gallon tank, so given all that, I assume that we cannot grow dwarf hairgrass, or can we? Also I have seen those ball shaped plant clusters that are actually balls of algea, "Moss balls", could we have one of those? Or is java moss pretty much the best option for us? Thanks!