how much boost do you add into your nft res each week?

guy at the growshop recommends only adding 5ml a week to a 20litre tank, coz it effects the cf reading.

i know on the boost bottle is says 1ml/litre, is it to strong at the dosage, or what is everyone else doing?

If you look at their website I think it says you can add 1mil per ltr twice a week or 2 mil once a week although the side of the bottle says 1mll , a bit confusing. However Ionic nutes are very forgiving so as long as you don't go over 2 mll per week you should be OK

I use autopots with coco and fill up my tank every 5 days and add 1.5 mils per ltr of boost with no problems.

i just use it at half strength then the repeat when i drop my nutes

I use it as per bottle - 1 ml / 1 litre, then check what ec that gives me.

Then I make the solution up to the desired final strength using the bloom nutes.

Your solution shouldn't be any stronger with boost, than without, rather you just have a different nutrient composition.
(let the plants tell you how strong their want their solution, by monitoring how ec level changes).

I am happy with what I get from this method.

thx chaps...mind you it does make sense to add the booster first, then the nutes.