I currently have a 10 gal tank with 10 red cherry shrimp inside. I have a few plants with roots but nothing big. Mostly taiwan moss. Anyways. The substrate now is white gravel. I want to change the substrate... How would I go about doing this without risking my shrimp? I was thinking just do a portion at a time.. like 1 day do the right side of the tank or 1/4 of it.. the next day agian.. etc. etc.. Take out the existing gravel and replace it with the new washed gravel....