dogstar, ill try enlarging the picture. see how i go. the length is 8 foot x 2x 2½ foot.(deep)
to flap doors above, plus a fix panel vented with fans, below: sump, r.o. container,float etc
5xdoors grilled for vent. will have drilled tank for water changes with tap, 1200 lts of salt water tank outside the house plummed into sump for filling.