Hey Duke I just found your thread here and I figured out what you need to do- you said your oscars like to redecorate, and that you have the algae overgrowth, so once a month drop an oscar in each planted tank for 5 minutes and let them have at it, or even better the pacus! but they should probably stay in for only 5 seconds, any longer and either all the plants will be gone or all the parts of the pacu that dont fit in the planted tanks would dry out! Your place looks peaceful with all the tanks- if you get too many more though youre going to need a snorkel!