So, a few days later after the Seachem Pristine was added... Firstly, I should say that because the initial dose was so small, I have added another two 5ml capfuls, each one representing about 25% of recommended dose for my tank size... Total dose now is @ 75%
Results are twofold... First noticeable thing is definitely a more "invisible" water column, which just looks so much sharper, brighter and cleaner... Secondly, while not removing detritus per se, you can tell that it has had the effect of breaking down the detritus, and still is doing... I purposely have not done a water change yet since adding the Pristine, so that I can see the differences it might make, but will do probably this weekend...
It's hard to evaluate the usefulness of the Pristine objectively and I am concious of wanting it to work and just how that affects my perception of the results so far, but my inclination is to view it as beneficial, just not by a very large margin... My plan is to continue with it and see where this goes - I will of course report back more on how things go with a bit more time... One thing I can say is that it hasn't made any noticeable difference to the cannister filter pipes - yet... Time will tell though...