I have several tanks with cherry shrimp. In all but one of them the cherry shrimp are a deep bright red. In one tank, the cherry shrimp (as they have reproduced and reproduced) have ceased being a bright red and are almost translucent with a green saddle...weird. I feed all the tanks the same, the only difference in this tank is that it does not have driftwood, just oak leaf litter. The tank temp is 74-76, 0 ammo, 0 trite, less than 10 trate. water changes every 4 days of 40%. They are fed algae wafer, sinking wafers, and fresh veggies. The tanks is planted with java moss walls, lace fern, and anubias. They are healthy and reproducing, just clear (some have red dots). I know I need to infuse new blood every so often, but I haven't had these very long and the other tanks are not pale. Any ideas? suggestions?