If your building a herring
pen, . . . >> > > >
You DON'T have to worry about Amonia. Mother nature will do her job with that. You also don't have to worry about Air. She'll take care of that for ya too. With a
pen, ALL you'll have to worry about is ..............
ME!!!
All kidding aside, are you talking about a "tank" or a "pen" Mr. Goose???
If it's a tank your asking about, Tattoo has a great set-up that perhaps he'll let you sneak-a-peek at. If it's a pen your after....besides being roomy and round, and of course making sure the openings are small enough (you don't want the herring getting caught inbetween the gaps)...the biggest issue would be SECURITY. Having it in a location that you could access without too much exposure is KEY. The last thing you want is a couple of monkeys taking all your hard work. So my suggestion is....
1st: Location
2nd: Construction (no sense in building sometihng you can't use/hide)
3rd: Ask a friend,
for help...
...it finally happened, there are no more secret spots
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