thanks for the link cardona...ill be picking some tubing up this week...and wyldfya thank u for ur input also...i KNOW u know ur stuff and apreciate all the input u have given me since i started my tank...its come along way i gotta post some pics...i see what u are saying about the tubing bouncing around in the current...i can correct that by making it out of hard tube....but so far i see no problems with it...like i said time will tell...and if i have any problems ill change the fitting and design...i dont think the reactor is poorly designed like some have stated...like cardona said he didnt know the tubing went all the way up and now that he does he see's no problem in the reactor...same as me...only thing is what u brought up about the tubing which i really didnt think of...another thing i was thinking of today is adding a very fine airstone inside the reactor to give it a headstart...even though i dont think i need it...it would be more diffusion...the bubble wouldnt start as one big bubble getting diffused but many smaller ones...what do u think wyldfya???