When I got home from my recent business trip (1 week in Japan) and had the
energy to look at the fish in detail I noticed that Hoshi has a couple of
visible blood vessels in his caudal fin.

Hoshi is a sarasa comet, about 5" long, all white except for an orange spot
on his forehead. His activity and appetite seem to be good. I tested the
water: pH 8, Ammonia 0 ppm, Nitrite 0 ppm, Nitrate 20 ppm.

Normal or cause for concern?

--
David L. Burkhead "Dum Vivimus Vivamus"
"While we live, let us live."
My webcomic Cold Servings
http://www.coldservings.com -- Back from hiatus!
Updates Wednesdays