Mike - I'd echo most, if not all of what Ric has stated. You're heading toward a train wreck (with a dip net and shovel in hand) if you don't get sufficient aeration going - and soon!
Also, based on your statements, I'd avoid any further advice from the fish hatchery guy. 1) grass carp don't seem to be a solution for any of the problems you've listed. 2) Pond dye is the LAST thing you'd want to add to your pond right now - make that the second-last thing - don't put any copper-based products in there or you could crash your excessive bloom and DO level, which as also what a lake dye could do (as the algae can absorb the pigment and die as a results). 3) DO NOT FERTILIZE! Your excessive bloom - probably a blue-green algae ("pea soup") - is an obvious indication that your pond already contains more than enough nutrients. 4) LMB are more sensitive to low O2 levels than catfish. I went to Pike Peak last summer. Now I know how a LMB feels when O2 is a problem. I could hardly walk around, much less enjoy myself (the TX Coast does't prepare one for such environments). Bass are quite capable of feeding in murky water. They possess sensory nerves along their lateral line that help them detect their prey - and many lures. But, they won't expend their energy if they're oxygen-stressed. 5) As already stated, "green to brown" is definitely NOT a good sign. Your algae population is crashing, and will likely take the DO with it - if it hasn't already done so.
At this point, I'd stay focused on getting the pond aerated and hopefully avoid a total fish-kill. Forget the CUTRINE (which, btw, is quite a bit different than copper sulfate) and the lake dye, at least for now. Once you've (hopefully) avoided an O2 disaster, you might consider steps to gradually reduce your bloom to more stable levels.
