[cuongt]

is it bad to mix rain water with tap water? if so why is it bad or why isnt it bad  hell confused.

thanx in advance

[Borek]

Define 'bad'. What kind of application you have on mind? Tap water is much harder, rain water is very soft, that's the main difference between both.

[Mitch]

pH is most likely different as well.

[cuongt]

well bad is like cause the teacher says if you mix these two together the water will get decontaminated( dirty) unlivable for fish.

[Mitch]

Then how do fish and animals live after it rains? The oceans, lakes and rivers still have fish last I checked.

[cuongt]

i dunno lol thats wat he told me. as in fish at home you look after. he said that if theyre mix theyll contaminate the water. ill ask him again 2morow  thanx 4 the quick replies

[Borek]

Tap water is often chlorinated (well, it depends on country) and thus unsuitable for fish. You have to leave it in an open tank for several days before filling aquarium.

[cuongt]

yep here in aus its very chlorinated  :Dlol ummm is there ammonia in tap water or any other substances? im from australia 

[Will]

is there ammonia in tap water or any other substances?

They may add ammonia and chloine/hypochlorite to make the disinfectant chloramine, or jast add chloramine direct to tap water. This is also dangerous to fish, but cannot be removed by leaving the water in an open tank for a few days, you apparently remove it by adding Na₂S₂O₅.

Also ClO₂ may be added to your tap water, there is a small list of disinfectants used here about two thirds down the page. There are other chemicals used in the water purification process that you might want to look at.

[lemonoman]

Don't forget fluorination, in some countries too, to aid with dental care

[Will]

Don't forget fluorination, in some countries too, to aid with dental care

Yeah I was reading about that too, it is in the link. The chemical they use normally is fluorosilicic acid or dihydrogen (or sodium) hexafluorosilicate or (rarely) sodium fluoride (I think it is called fluoridation, not fluorination ). They normally use sodium fluoride (and rarely sodium monofluorophosphate) in toothpaste, thought I might as well mention it.

[cuongt]

cheers guys thanx for all da help