Easily, problem with the pi camera would be light balancing. Might get that running with tank two, which isn't too far away. I'd do it slightly differently tho, and attach a light sensor to only take an image when light is above a set limit. Probably wouldn't do a photo every hour, more likely, I'd do an image every 10 minutes, for 8 hours a day for two months or so, that should be more interesting, but would loose the character of previous example, it's nice imo to see a slow snail more faster.Could you take a picture every hour during say a week or two to see the plants grow ??