The ph out of my tap is between 7.5-8 (end of color chart so not sure exactly). After I add the tiger bloom it goes down to 6.0 or lower. I bring it back up to as close to 7 as I can get thinking that the soil will bring it back down to the mid 6s or so.

I thought that molasses did not affect the ph so I have not checked. I will do so if I can. The water looks like ice tea after I add the dark molasses so it may be difficult. Maybe I was wrong about it not changing the ph when added to the water (1 tbl sp. per gallon). I will look into that.

I take it by your response that you are leaning towards a ph issue?