its a red wolf.
erythrinus erythrinus.
those in serangoon always have wounds.
but they heal fast.
when i got one there,i just add salt and my tank temp is always high.
they tolerate any kind of water.
but i think lower ph is better.
have good filtration too.
I keep mine at 82 degrees, they like softer water as well. Aside from the temp they really aren't too picky about their water conditions, they just prefer clean water.