2/23.day20 - 50% WC, then another det kit: amphipod breeders, 5 small clams (turkey wing?), 10 mixed snails unidentified, 6 bristle worms, black spiny urchin, ulva mat (green alga), red alga - 2 types; staghorn?, finer red macro? Calibrated all probes: pH high at 9+, ORP high at 450+ Pre RO/DI...