Soft shell crab filter system

Ok ok u got me I guess but I just copied this from lakemt.gov

CONVERTING HOUSEHOLD BLEACH TO PARTS PER MILLION OF AVAILABLE CHLORINE
Typical household bleach contains approximately 5.25% chlorine which is free to react with water during the disinfection process. When performing shock disinfection of a water system it is important to use enough chlorine to achieve approximately 50 ppm (parts per million). If you use too little bleach you may not eliminate the bacteriological contaminants. If you use too much chlorine you will create a taste and odor problem, which is hard to correct and may form cancer causing trihalomethanes.

Now if you want to kill all the good bacteria on your "bio balls " or on your clam shell filter by all means go ahead add the bleach again I in no way insulted this man. I just said DO NOT ADD BLEACH you should be using RODI or reverse osmosis de ionized water to fill your tanks to get all chloromines out as well as any other contaminants your city water may have fluorides along with all the other [curd] in New Orleans water here is the city water report for 2014
This is why a RODI filter should be used instead of your city water
Total Coliform Bacteria Yes % Positive 0 – 1.1 0 – 1.4 5 0 Naturally present in the environment samples per month
Turbidity 1 Yes NTU: Lowest monthly %
of samples < 0.3:
0.04 – 0.7 98.9%
0.07 – 0.3 100%
1.49 for any one sample; N/A Soil runoff 95% of samples each
month should be < 0.3
Fluoride Yes ppm 0.46 – 0.91 0.47 – 0.88 4 4 Erosion of natural deposits; water additive which Avg. = 0.72 Avg. = 0.71 promotes strong teeth; discharge from fertilizer and
aluminum factories
Nitrate Yes ppm 1 ND 10 10 Runoff from fertilizer use; leaching from septic tanks, (as Nitrogen) sewage; erosion of natural deposits
Copper Yes 90th percentile ppm: 0.1 0.0 Action Level = 1.3 1.3 Corrosion of household plumbing systems; erosion of No. sites exceeding AL: 0 of 53 sampled 0 of 31 sampled for 90th percentile natural deposits; leaching from wood preservatives
Lead Yes 90th percentile ppb: 6 2 Action Level = 15 0 Corrosion of household plumbing systems, erosion of No. of sites exceeding AL: 1 of 53 sampled 0 of 31 sampled for 90th percentile natural deposits
Arsenic Yes ppb 0 – 1 ND 10 0 Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes
Dalapon Yes ppb 19.4 20.3 200 200 Runoff from herbicide used on rights of way
Simazine Yes ppb ND 0.8 4 4 Herbicide runoff
Di(2-ethylhexyl)phthalate Yes ppb 0.75 – 0.89 0.68 – 1.05 6 0 Discharge from rubber and chemical factories
Uranium Yes ppb ND 1 30 0 Erosion of natural deposits
Total Chlorine Residual Yes ppm 0.5 – 4.9 0.6 – 5.3 MDRL: MDRLG: Disinfectant added during water treatment highest RAA = 3.4 highest RAA = 3.0 RAA should be < 4 RAA < 4
Total Organic Carbon Removal 2 Yes ratio 1.00 – 1.65 1.00 – 1.26 TT N/A Naturally present in the environment lowest RAA = 1.12 lowest RAA = 1.00 RAA should be > 1
Total Trihalomethanes Yes ppb 12 – 33 12 – 45 LRAA should be < 80 N/A Byproduct of drinking water disinfection (TTHMs) highest RAA = 23 highest RAA = 29
Total Haloacetic Acids Yes ppb 10 – 30 11 – 45 LRAA should be < 60 N/A Byproduct of drinking water disinfection (HAA5s) highest RAA = 23 highest RAA = 31
UNREGULATED CONTAMINANTS 3 detected in 2009 and 2010 (from EPA’s Unregulated Contaminant Monitoring Regulation 2)
N-nitrosodimethylamine N/A ppt (NDMA)
8 – 36 14 – 33 N/A N/A Avg. = 16 Avg. = 20
Byproduct of chemical synthesis and manufacture of rubber, leather, and plastic goods; nitrate reducing bacteria; Foods such as bacon and malt beverages can contain nitrosamines.
UNREGULATED CONTAMINANTS 3 detected in 2014 (from EPA’s Unregulated Contaminant Monitoring Regulation 3)
1,4-Dioxane N/A ppb 0.40 0.16 N/A N/A Used in the manufacture of paper, cotton, textile products, automotive coolant, cosmetics, and shampoos.
Vanadium N/A ppb 0.54 – 1.1 2.1 – 4.1 N/A N/A Naturally present in the environment; used as
Avg = 0.78 Avg = 3.1 vanadium pentoxide which is a chemical intermediate
and a catalyst.
Molybdenum N/A ppb 1.9 – 2.6 2.0 – 2.2 N/A N/A Naturally present in the environment; molybdenum Avg = 2.3 Avg = 2.1 trioxide is a commonly used chemical reagent.
Strontium N/A ppb 190 – 230 140 – 180 N/A N/A Naturally present in the environment; was used in the Avg = 210 Avg = 160 glass of CRT televisions.
Chromium – total N/A ppb ND 0.37 – 0.80 N/A N/A Naturally present in the environment; used in the Avg = 0.59 manufacture of steel and other alloys.
Chromium – hexavalent N/A ppb ND 0.12 – 0.12 N/A N/A Naturally present in the environment; used in the
Avg = 0.12 manufacture of steel and other allows, chrome plating,
dyes and pigments, leather tanning, and wood preservation.
Chlorate N/A ppb
150 – 370 320 – 360 N/A N/A Byproduct of disinfection of drinking water; agricultural Avg = 263 Avg = 340 defoliant; used in the production of chlorine dioxide.