Looks like the link Erick gave us sometimes thinks we are mobile users; On the bottom says switch to full site allows to view pics in full size.
I used to want a 100mm Weather Resistant Macro; Instead Snagged My Pentax Fa 50mm Macro used off eBay for $80; Since it's was so cheap I just treat it like WR lens and is holding up like one ... Thought I had some extra clip on close up filter's and raynox I don't need but looks like they may have been lost since ...
I thought the pink skunks where especially cute ...
aqua-nut --- why not just make a smaller reef pond next to the freshwater; use the freshwater pond to chill it in the summer; say 4ft x 6ft x 2ft

http://www.tsekoi.com/ponds/laguna.html
or maybe just a 4ft x 4ft x 16" shallow cube tank outside ...