Provided the tap water parameters are those that are required for keeping Discus there should be no problems. You would of course have to make sure any chlorine or chloramine is neutralised. Parameters for Discus are pH about 5.8 to 6.2 Total hardness about 25ppm but should be <100ppm. Temperature around 82F to 87F (never below 80F). Minimum size tank for Discus (they are shoaling fish and when young need to be in groups of 5 or more) is 48"x 18"x18" with a well cycled power filter to suit tank. Discus need a minimum of 10% water changed daily and at least 50% changed weekly. The tank can be bare for ease of cleaning but some people take the risk and have a substrate and plants.
No seahorse can live in tap water they can only live in salt water
No
No
They are not better than tap water, they are basically equal in nutrients. People just think its unhealthy due to those misleading commercials. Water bottles < Tap Water Why? Water bottles = $$$$ Tap Water = $
Depends on where you live.
Yes, minnows can live in tap water. However, for them to live long in tap water, they need to have access to food and oxygen dissolved in that water.
only fresh water clams can not salt water
it depends on where you live, or specifically where the tap is that you are opening up. It will come from well water or the town's drinking water supply.
Tap water has vitamins in it, Iron and such.... Some tap water is bad too there is some tap water depending which area you live in have to much arsenic in it and will kill your plants. Your town should have a water survey you can find at your local library.
Always use tap water. Salt water kills all plants except plants that live in the sea.
in water
The environment the plant likes to live in is fulfilled by the tap water. there is a current, oxygen and minerals. therefore, it lives there because it can. simple plants such as a mold don't decide where they want to live and live there because they like it, they live there because it is possible for them to.