Discus grow out tanks

I have a 125 on the left which will be the grow out tank.2-75gls on the right,Top 75gl is for water storage and the bottom one is for Pista,water lettuce.The bottom 75 driven by a 700gph pump and the 125 is driven by a 950gph pump share the same 55gl sump.The bottom 75 has a valve so I can hook up a hose for easy w/c and the top 75gl has a valve that drains it into the bottom 75.For fast hands free 75gl w/c.Now what I have going on here is the bottom 75 is going to be loaded with Pista,to aid in the goal for pristine water for my discus.What do you all think?
...............please watch video.....................
http://s551.photobucket.com/user/meggy_lue/media/VID_20130602_192209_zpsc07129e8.mp4.html

Wow no one else thinks this is a good Ideal?