cool cheers pal,what about the di, do i get one big one or two little ones and whats a good size to get?
I recommend 2 x 11Ltr vessels. You can't pre-filter with older resin by using just one vessel.
Start with just one vessel in the very beginning, then when this first vessel starts to expire & the resin PPM starts rising from 000- instead of throwing it away you use it to pre-filter a new second vessel- see?
So, now, instead of your new resin being fed tap water, it's being fed 005/010 or whatever (which is your original first vessel. You then continue this cycle as you go along. The resin that would have traditionally been thrown away is now being used to pre-filter new resin. This makes FULL use of your old resin & extends the life of the new resin.
Hope that makes sense.