Hey Computathug,

thanks for the response to this thread. I have some new info to share about the PK 13/14.

I ended up switching to the GH 3 Part nutrients and following latewood's famous recipe because i've seen the results and they are truly astounding.

In the later part of his recipe thread he talks about adding bloom boosters of different varieties. So i decided to add my PK 13/14 to the mix and i kind of regret doing it.

Here's Why:

I did a res change 2 days ago. i added my nutes and ph'd my water from 7.8 (tap water) down to 5.8 using a reasonable amount of pH Down (roughly a teaspoon) and it was stable morning, noon, and night.

Yesterday, after reading about Latewood's Bloom Boosting ideas i decided to add my PK 13/14 because it's a new bottle and would go unused otherwise. I checked my pH, a nice 5.8...added the PK 13/14, checked my pH again and it shot up to 6.5...bummer...i thought this stuff was supposed to be inert.

anyways...long story short...i took me ANOTHER 2 teaspoons to bring it from 6.5 to 5.8...which is twice the amount of pH Down i used to bring it from 7.8 to 5.8 the day before...i dunno what it is about the PK 13/14 but it made it really hard to get my pH back to normal...just beware.

if anyone has any suggestions or info to add about this crazy product...please let me know.

thanks!
Skeet.