well just got back from the holiday and will grab a handful of the substrate and some water to do a check. the readings from frida with no food went to nh3 0 ho2 0.1 and no3 10. added some zoanthid and shrooms before i left after the water change. during the midnight injenuity rants in my mind i imagine the possibilities to cut the baffles in the sump area, and organize with what would fit like an aqua c skimmer with spray injection or the sumpbuddy 40 with downdraft but ther more you research the more the confusion sets in , also a question of cutting the acrylic but with what,hoping not to stress the frame.the onlything i am set on i skimmer frist, mechanical media second, small fuge last chamber return pump and uv now how to i accomplish this Perhaps a beer and a 300am talk with the tank inhabitabts.. i can only vacuum the substrate where there is no rock available not a lot of room there .but the weekends over timer to brainstorm again.what is the evolution of the skimmer, airtstone ...... to the latest which is?