iv got the big cool tube the one jm is showing on the post plus a power plant areowing with 600w in them in line with a 8inch fan blowing thru them,the powerplant was £60 and the big ass cooltube was £55 but less heat escapes from the powerplant than the cooltube,so the powerlpant is excelent £$ for value and is only afew quid more than the cooltube,i only got the cooltube as a fill in untill i can get my hands on apowerplant as the hydroshop only had the 1 pp left..