lots of bubbles in water

lots of bubbles in my water, is something wrong?

check soil ph

it's deep water culture, ph is 5.8

temp under lights 76 degrees, humidity 45%, water temp. is 69%. 14 gal. reservoir with 3 micro-pore oxygen diffusers, pump commercial grade 45 liters per minute(active aqua). Just added new nutrients, will that make it bubble? 1/4 recommended dosage of ionics grow, nitrozime, greenfuse root stimulator and fossilfuel.

egads....that's a bunch of stuff....how old is the water again?

i just did a reservoir change, the nutes on 2 are 1/4 recommended dosage, the other 2 are 1/8.