I am having, and been battling red slime for quite some weeks now maybe months I don't know. Anywho, I wanna siphon my sand to get it out but it just sucks all the sand with it so I need to get it back in the tank. I also wanted to bring my sand bed from 1.5 to 2.5 in the process. But why is it people rinse it thoroughly before putting it in tank? Seems counterproductive Considering its NEW and LIVE. doesn't adding it back in just help replace the beneficial elements I have removed from siphoning the my old sand bed of the red slime?? Also been battling 0(zero) nitrates for weeks and weeks and weeks. Just curious everyone's thoughts on this.