I aint going to rock the boat at this point in time, They are the biggest and supposed best in wigan. But they do seem to be a funny crowd in there, Like when i mentioned that i had seen a refractometer on ebay for about £25 they told me it would be rubbish. Everything i seem to do is wrong to them, thats why i'm glad to have found this forum. I have since found another lfs who is only about 300 yards from them, He doesn't have a massive marine section but he has what i need and he's willing to take the nem off me for a full credit. Needless to say the word is being put out on streets about the bad advice..... Thanks for all your concern. P.S There is a picture of the system and the nem on show off you tank.