The Hobie tanks* work great for net carrier, esp. the Ambush nets, and
also provide good lobster storage (or dry storage) inside. They make
great bait tanks during the day of course too...
Make sure you add short bungies connected to the kayak under your nets,
one bungie cord hook on each side of the tank.
When traveling with nets onboard, stretch these bungies up THROUGH the
netting of ALL hoops near the net edge, and lock the bungie hook over the
top net's support bars to hold them all tightly in place. Of course your
tank should be tightly secured to the boat as well.
This is a little more difficult to hook/unhook, but if you tip sideways when
launching and landing, you will be very glad you did it. Remember the nets
make your kayak a little more top heavy, so I would never try to launch
through much 'surf' with my nets onboard.
* People complain that the tanks are too expensive ... but my experience is
by the time you get done building your own with materials, tools, drill bits, &
time involved, you end up with something that will work most of the time
AND has ISSUES, and co$t plenty too. I spent years messing with my own
contraptions before convincing/helping Hobie with their tank design back in
2005/2006. I really, really need mine to work EVERY TIME I fish.
P.S. If you are being sarcastic on the forum, it helps to add the 
. : ) I enjoy sarcasm.