You're both welcome - I've recently abandoned soil (and hopefully soil borne pests) and will only be growing in hempy pots from now on.
It's amazing the results from using bog-standard, bought @ Bunnings, Yates brand "Thrive" (yellow crystally shit - just add water), general purpose, seven bucks a box fertiliser.
Maybe $50/litre hydro nutes would do the job better (maybe not as well) but my $7.00/box shit will last years and should make good buds
The fertiliser that I use in Hempy is made up at half strength and I use it every time I water. If you allow about 1/3 of the water/nutes to flow out of the drain hole then you are constantly flushing your pots and salt build-up is not a problem. Wasting 1/3 of my nutes is no problem as they cost fuck-all to begin with
The best part about Hempy growing is I haven't had a single overwatering problem. With soil I was always having issues with too much water, with hempy - just pour it in until it flows out - can't over-do it at all.