i ended up buying a floval 1... quite funny actually the guy in the shop (Pets at home) was telling me to buy the stingray but an older guy walked by and said 'fluval 1 all the way mate' so i got the fluval, seems to be doing well... ive turned the undergravel filter off just for the first few hours of using this new fluval.. looks like its doing the bussiness anyway! thnx you ppl