I`ll keep a close eye on the levels, and if all is stable by sunday, I`ll be hot footing it to the Lfs! How can I bring the Ph down, is this only possible with one of those RO units, or can I achieve lower reading another way? Peat or more bogwood, or by using chemical additive? should I lower the temp? its at 80 at the mo, but should i turn it down, what temp is best?