Henry is changing colour. When we got him he was mostly pink with some (what I thought were) black spots. Now his body is becoming mostly dark blue and he has a couple of dark streaks in his tail. It's been a gradual change so we didn't notice it for a few days.
I have attached two photos of him, Day 1 and Week 2. He is in a 2.5ga tank with a heater and light. The temp ranges 78-82. My heater isn't adjustable, and I'm going to get a better one, but between the heater and the light, the water is kept at a minimum of 78. I'm doing water changes, tests etc. He seems perfectly happy. I have no idea how old he is but I imagine they don't last too long at Petsmart so he's probably not too old.
Max also seems to be changing, he's gone from a sort of grey to a deeper grey body with a blue/purple iridescent tail.
They both seem happy and after some initial issues with feeding Max and with Henry's tail (which I now think is probably due to a filter accident) they seem settled. Max is eating well and Henry's tail seems to be growing back together.
Should I worry?
eta - his body isn't shrinking, it's bad perspective from the tank and my iPhone app.