Well, we got our shrimp 02JUN18 and things were looking well. Biofilter was running and water chemistry was great. But, we had a run of 90+ degree temperatures. I noticed when I stocked the pool (high wind came through, knocked down the biofilter on one pool and the pool drained) that the water was still clear, very little algae present. About 4 days later, I noticed that the water was a green soup. My research had indicated that algae were good for the shrimp (natural ammonium processors, contribute some oxygen to the water during photosynthesis), so I hadn’t worried about the water. Then 5 days after I introduced the shrimp into the pool, I notices a purplish mass near the water pump. I retrieved my shrimp net to try to catch some. There were no shrimp. Turns out (from talking to my livestock source) that algae will “bloom” at night during high temperatures and “suck” the oxygen out of the system. The shrimp will form a mass when dying and the mass will have a purple tint. Moral of the story: Over-oxygenate the water, use covers to prevent algae growth.