posted 10 years ago
Hi Jeremy,
If you're in zone 5b, the major gotcha is likely to be the winter. I'm not sure if you're planning to grow year-round but that's a big one. There are ways to do it, though.
There are lots of other little things such as pH, general hardness, nutrient deficiencies (like iron), dissolved oxygen, pipes clogging for a million different reasons, fish breeding, etc...
Aquaponics is a pretty steep learning curve. If you have specific questions I could help.