Related by context. Frequent words. (Click for all words.) 65 rotenone 65 copper sulfate 62 chloramine 62 Rotenone 60 coagulant 59 chloramines 58 chlorinating 58 sodium hypochlorite 57 Bti 56 chlorine 56 chlorination 56 biocide 56 insecticidal soap 55 Malathion 55 diatomaceous earth 55 Epsom salt 55 larvacide 54 chlorine bleach 54 activated charcoal 54 chlorinated 53 softeners 53 alkalinity 53 isopropyl alcohol 53 dissolved solids 52 permethrin 52 Eurasian milfoil 52 DMSO 52 aerator 52 aeration 52 naturally occurring bacteria 52 alkali 51 activated sludge 51 Hydrogen peroxide 51 Epsom salts 51 hydroxide 51 Baking soda 51 oxalic acid 51 chlorine dioxide 51 silver ions 51 sulfite 51 sprays 51 foliar 51 herbicide 51 imidacloprid 51 potassium hydroxide 51 muriatic acid 51 sodium bicarbonate 51 methylene chloride 50 Aeration 50 membrane filtration 50 algal bloom 50 Nitrates 50 diazinon 50 nitrates 50 apple cider vinegar 50 larvicide 50 Cryptosporidium 50 Sulfate 50 malathion 50 salicylic acid 50 fungicide 50 borate 50 chloride 50 effluent 49 Hydrilla 49 antibiotic ointment 49 chlordane 49 spray 49 cryptosporidium 49 clarifier 49 iodide 49 insecticide 49 thinners 49 chlorides 49 adsorbent 49 recirculation 49 granulation 49 pH 49 graywater 49 aquatic weeds 49 Hydrochloric acid 49 aerators 49 brine 49 ammonia 49 chlorinate 49 acrolein 48 spray nozzle 48 leaching 48 pyrethroids 48 hydrocortisone 48 water softener 48 salts 48 harmful pathogens 48 water softeners 48 reverse osmosis 48 denitrification 48 softener 48 pretreatment 48 discolor 48 fumigants 48 colloidal silver