I just got rid of my 4x8 tables and i've never been happier. thos liners look like they are the way to go. I've also noticed ebb & flow gets the table really dirty, to compared to a top feed system because the water level goes up the sides of the trays, then drys, and cakes on. with the top feed the table never gets over an inch high. the top feed allowed me to use up the whole 70gal res in one week without top-ups because its only needs probably 5gallons to run throught the tubing, instead of having to refill it twice during the week with ebb&flow so the pumps dont dry pump because you need like 60gallons to flood the table, then after topping if off twice a week i'd have to drain a full res at the end of the week. I feel your pain, and some does my girl who i gave the tables too, shes cleaning them as we speak