Leaving tank for 3 weeks

[mark]

guess depends how handy your Dad but always nice to have a number for him to call if something he's unfamiliar with happens (example a pump goes u/s).

I was gone for 2 months and mine survived with basically a newb doing what you're thinking for your father, just feeding and cleaning skimmer.

[ColinD]

I just got back from 3 weeks vacation, tank sitter bailed after 1 week, make sure you have a back-up plan, I didn't

Colin