I am going to put this under photography because, well its used for viewing and would be great for people with reef tanks or any of us that take pictures of our tanks. I am interested in buying one but the only one for sale now is the 4" portal. I am not sure if thats too big for the 28gal JBJ or if it would be better for viewing then then 2.5" nano thats coming soon. Thoughts? All the reviews on marine depot are positive other then you guessed it the $79.99 price that it comes with.
http://ivsportal.com/
http://www.marinedepot.com/Innovative_Viewing_Systems_Portal_w_Scrubbing_Pads_Miscellaneous_Saltwater_Aquarium_Supplies_Viewers-Innovative_Viewing_Systems_(IVS)-IO00300-FIMIVW-vi.html
http://ivsportal.com/
http://www.marinedepot.com/Innovative_Viewing_Systems_Portal_w_Scrubbing_Pads_Miscellaneous_Saltwater_Aquarium_Supplies_Viewers-Innovative_Viewing_Systems_(IVS)-IO00300-FIMIVW-vi.html