15 Gallon Tank PH question from a relative noob

My tap water's pH is 7.8; aquarium is 8.0.

Too high? I don't know what to do. Can you help?

So far I have harlequin rasboras and cory cats. Just stocked yesterday.

Thanks

 

Tap water will often have dissolved gases in it so after a bit of settling the pH will rise due to the Co2 escaping the solution. Did you test the pH straight out of the tap?

Other than that, you could have some sort of rock that is adding minerals to the water.

 

Tap water will often have dissolved gases in it so after a bit of settling the pH will rise due to the Co2 escaping the solution. Did you test the pH straight out of the tap?

Other than that, you could have some sort of rock that is adding minerals to the water.

Yes; tap's 7.8.

Is 8.0 too high for my fish?

I did put in a rock (brand new tank as of yesterday), but then I read that rock should be quarantined. The rock was in for about an hour before I took it out.

 

Mine is the same but more drastic. 7.6 tap and 8.2 tank. Gotta love Michigan liquid rock!
8.0 is fine for most store bought fish.

Unless you are going to keep super wild species or delicate species, I wouldnt mess with it unless you plan to go with RO water. I keep all kinds of different fish myself and dont mess with anything. I will say some plants dont like my water though. That will be your biggest trial and error with your water.

What kind of rock?

 

Mine is the same but more drastic. 7.6 tap and 8.2 tank. Gotta love Michigan liquid rock!
8.0 is fine for most store bought fish.

Unless you are going to keep super wild species or delicate species, I wouldnt mess with it unless you plan to go with RO water. I keep all kinds of different fish myself and dont mess with anything. I will say some plants dont like my water though. That will be your biggest trial and error with your water.

What kind of rock?

Thanks for your reply, StarFish. No need for RO water.

I won't have anything but live for my plants. I had a betta in a five-gallon tank a couple of years ago and didn't have any problems with the plants, so I'm hopeful.

I don't know what kind of rock it is. The rocks and wood at my LFS aren't marked. It was still in the tank when I took this picture.

 

it doesnt look like a rock that would raise pH levels. Maybe someone else can identify? A201 may know for certain.

 

The pictured rock is fancy (Ryolite), a rock that is mostly quartz. It's aquarium safe & often sold at fish stores.
I have several colorful pieces of Ryolite that are occassionlly rotated into my hardscape.