So I have a fully cycled 10 gallon aquarium. It has a heater, an air stone, and a filter. It has a live plant and a moss ball. Their are lots of rocks and hiding places in it. I was wondering what fish I could put in it. Since it has a very high ph, I decided to try guppies out at first. Three of the guppies died from what I assume to be weak genes (they were from petsmart). The parameters are: ph 8.4, gh 15ish, kh 15ish, ammonia 0, nitrite 0, nitrate 10. The ph is very high, but after doing some research, I decided not to mess with trying to change it. Any fish would definitely have to be hard water fish that would get along with my two remaining guppies (they are doing absolutely great, so I don’t think the others died from a water quality issue). Thanks for any suggestions!