i'm in southampton and it is only the 3rd time i've seen them available. In 10 years. though, thinknig about it there is one place that has motoro's near portsmouth. I guess i didnt think about it as they were VERY expensive and i didn't have the tank at the time.
I have been looking at the water quality issue and it seems that the water comes out the tap at PH7.8 and the water in the tank is sat at 7.8. I'm having a similar convesation on another forum and so far i have established that one of the many keys, is stability- constant temp, PH and so on. I shall keep an eye on the PH as i am all the other water properties within the tank.