HELP! Fish advice ASAP!

[Emilyruthann7]

You can do a big water change and gravel clean the substrate every day for a week or a couple of times a week, it's up to you. But when you do a water change, treat the new water with salt before adding it to the tank so the salinity in the aquarium remains constant.
eg: you remove 5 gallons of water, you treat 5 gallons of new water with salt and then add that water to the tank.

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Add 2 heaped tablespoons of rock salt for every 20 litres (5 gallons) of tank water.

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Yes, leave the neons in the tank and treat all the fish at the same time to prevent cross contamination.

Can I treat the 10 gallon even though it has shrimp and live plants in it? If not I feel like I should just put the tetras in the 5 gallon(quarantine tank) and do a large water change and gravel clean to the 10 gallon(the main planted tank).

 

[Lynnzer]

It could well (sic) be that your thoughts on the well water are way out. Remember the quality of the river water, and hence a knock-on effect to the water in the natural water table is at best questionable over in the USA. There have been so many quality limitations lifted by Trump's EPA demands. Water quality is falling. The rivers are getting all sorts of chemical residue in them, perhaps with things that don't immediately show on the normal testing we do. remember Erin Brokavich?
Could you perhaps buy bottles water and give that a try. Buy the one that has the least cost such as I do at my local store at 17p per 2 litre bottle, and that has a PH of roughly the amount you need. I need the reverse to your requirement. I want the lowest PH I can get for my chili rasboras.
Most inexpensive bottled water is around 7.8 which should be fine. If you need higher then adding a limestone rock may give it the necessary adjustment.

There's also one more potential problem from using well water. It could have all sorts of microscopic $hit in it. Anything from micro-organisms hard to see but dangerous to fish to even a dead rat that has fallen in and drowned.
Give it a try with bottled and see how they get on with that BUT if I were you I wouldn't be keen on drinking the well water.
As a final thought, if you can't get bottled water easily you may be better trying to boil the well water before using it. And letting it cool though, as if you need to be told......

 

[Emilyruthann7]

It could well (sic) be that your thoughts on the well water are way out. Remember the quality of the river water, and hence a knock-on effect to the water in the natural water table is at best questionable over in the USA. There have been so many quality limitations lifted by Trump's EPA demands. Water quality is falling. The rivers are getting all sorts of chemical residue in them, perhaps with things that don't immediately show on the normal testing we do. remember Erin Brokavich?
Could you perhaps buy bottles water and give that a try. Buy the one that has the least cost such as I do at my local store at 17p per 2 litre bottle, and that has a PH of roughly the amount you need. I need the reverse to your requirement. I want the lowest PH I can get for my chili rasboras.
Most inexpensive bottled water is around 7.8 which should be fine. If you need higher then adding a limestone rock may give it the necessary adjustment.

There's also one more potential problem from using well water. It could have all sorts of microscopic $hit in it. Anything from micro-organisms hard to see but dangerous to fish to even a dead rat that has fallen in and drowned.
Give it a try with bottled and see how they get on with that BUT if I were you I wouldn't be keen on drinking the well water.
As a final thought, if you can't get bottled water easily you may be better trying to boil the well water before using it. And letting it cool though, as if you need to be told......

Im not sure where you live... but my well water is not dangerous, where I am it is some of the safest, mineral enhanced water there is. No dead rats are in the well...and it is 100% safe to drink and safer than bottled water. Once again, my water quality is not the problem. I’ve talked with my mother and a few different local fish stores, and they all said the water I have should be perfect for guppies.

 

[Colin_T]

Can I treat the 10 gallon even though it has shrimp and live plants in it? If not I feel like I should just put the tetras in the 5 gallon(quarantine tank) and do a large water change and gravel clean to the 10 gallon(the main planted tank).

It's fine to use salt with plants and shrimp. Just use 2 heaped tablespoons of rock salt for every 20 litres (5 gallons) of tank water.