Recommended Fish For High Ph

Livebearers are a good choice, but my personal favourite for a tank that size and with a pH that high would be Emerald Dwarf Rasbora. They are little gems that do well in larger groups.

How hard is your tap water? Hardness is more important than pH, though they often are high together. You should be able to find out the hardness from your water company's website. Make a note of the unit they use (and there may be more than one) as there are half a dozen ways of measuring hardness. Water companies all seem to choose different units, but there are only two used in fish keeping so you may have to convert the values you find. Don't worry, I've got a table of conversion factors stored away 


Edit to add - I have remembered you are in Bournemouth so I googled it. It's here and it seems you should have hard water with north of Ringwood being a bit harder than other areas. The figures used in fishkeeping are ppm CaCO₃, usually just called ppm, and German degrees.

And you do need to look at hard water & high pH fish.

I have seen your other post and the photos of your tank, and see it's a biorb. These can't be stocked as heavily as a rectangular tank of the same volume because of the small amount of surface in contact with air. If you use the Community Creator on here, don't go the max it says for 60 litres.

With a 60 litre tank you do need to look at small fish. Cod has already suggested emerald dwarf rasboras but you clould also look at endlers. The males are small and colourful and are fine as a group of males. The females are bigger, pale grey-beige and will have a lot of fry! And they are hardier than the closely related guppies (even though endlers in shops are all endler guppy hybrids, they look like endlers)

Most other hard water fish get too big for a 60 litre tank, I'm afraid.