Yeah Tiny, BGhydro stopped selling the GH Ph up in liquid form (due to shipping I guess). So I bought the dry form.

I mixed it 1C dry to 3C tap water (not knowing how strong to mix) and ended up with a very strong solution compared to the liquid version. I would guess that 1/4C would make a solution closer to the liquid version.

I called a GH tech and he was unwilling to venture a guess as to ratios that may be equal to the pre-mixed.

I also made a mistake in that I put the dry mix into the bottle before adding water. It pretty much clumped up in a lump and was very hard to mix. I think adding the dry mix to the water would have worked out much better.

The biggest plus is that dry mix is going to be very inexpensive and will last a long long time.

The drawback is that you will have to relearn how much to use.

Hope that helps,
HMR