Aye, although pH of 7 is neutral, different fish lives in different pHs in nature.
The fish you mentioned for example, have a wide range of pH ranges. Clown loaches and tetras require lower pH, rainbowfish and geophagus required higher pH. Well rainbowfish varies greatly, but the ones sold overseas are mostly high pHers.
However it mostly does not matter, most fish (especially cichlids) in the hobby are quite resilient and can easily thrive in pH outside of their natural range (provided it's not extreme). It's more important to have a constant pH than anything.
Depending on what test you're performing, you'll see the different pH as different colors. They should have a comparison in your test kit, for your specific test.
With that said, STOP CYCLING THE TANK DUDE AND THROW YOUR FISH IN. :3
Um, I'm confused. I thought geos required a lower ph?