list 2 ways how humans can affect water quality. please please hellp its ergant!!! 10 points for the best answer!!! easy 10 points

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Does anyone know the effects of coal soot in water? Does it change the pH or the hardness of the water? If the emissions of the coal burning facility (in this case a coal furnace for ones house) were directly injected into a water supply how would that affect it? Would it kill things or would there be an algal bloom due to the high amounts of CO2? Im doing an experiment in which I WANT an algal bloom. Any help would be appreciated. Thanks!

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I just got some ferns with baby snails all over it. Will it help improve the water of the tank?
I don’t think there will be that many snails, my gold fish is eating them.

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I have asked this question before; but people don’t seems to get what I mean so I’ll try to ask it differently. In a fish aquarium isn’t the water quality all about nitrate; ammonia; pH levels etc? Hypothetically even if there is a lot of waste but all levels are fine aren’t the fish fine? Isn’t it all about levels?
Venice hypothetically means lets just pretend. Also there are neutralizers on the market.
I agree with they need an ecosystem; thats kind of my question. Even if your water appears dirty as long as the levels are fine the fish are fine; correct?
Cleaning the water to much will destroy natural bacteria; so as long as the levels are fine; the tank and fish are fine?
Almost what I’m looking for Donna. If all levels are fine; and a water change hasn’t been done in 6 months; the tank is fine; right?
yes venice; but if nitrate/nitrite are in adequate levels the tanks fine; right?
Guppy guy thank you. That’s all I wanted to know; very simple answer to simple question. More answers like Guppy Guy’s edit would be appreciated agreeing or disagreeing with him
Also guppy guy you bring up a good point in that example; waste is still present but the levels would be fine. I guess the person with 6 neons has achieved what 99.9% of other fish keepers couldn’t

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we heard some have e-coli and other nasty things.

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We will conduct an investigative report about the water quality in our city yet I can’t find simple tests, a tests that fits for a highschool student, a tests that do no requires expensive equipment yet reliable. Please help. I badly need it… Please. Thank you so much.
Thank you so much! I appreciate all of your answers… I have read a test regarding “the use of broth”, what do you think, huh?

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