I just bought a pleco two days ago. I bought it and they told me it was a vampire pleco. However, when I started researching it a little further the only pictures I found of vampire plecos were all black with white spots. Mine is the exact opposite being all white with black spots. Is this still a vampire or is it something else. Also, how long should I wait after getting a few new fish to do a water change. I usually try to do at least at 10-20% water change every week. Should I just skip this week to let them get used to the water? Thanks for the advice.