along with some other nifty stuff i got a bubble wall for my 10g tank for christmas. i was due for a MWC and emptied about 80%, rinsed the bubble wall and stuck it to the bottom of the back wall. i have sand in my tank, and it is usually cloudy after a big water change, but i think that the movement created by the bubble wall is causing the cloudiness to persist. my question is... are bubble walls and sand substrate not compatible? or should i just wait and see if things settle. i would hate to take out the bubble wall, my guppies love it and the loaches snake in and out of the bubbles. any suggestions?