Are you draining down the mats into a reservoir or how is your drainage setup? Looks nice!
I am in 2x4 tables... 3 of them side by side.
I got 1/4 inch corrugated plastic sheets and put the pots have way through to cover the roots / stop dead leaves.
I have a hole in each tray.. Their also slightly tilted for drainage
|___|___|___ |_|{bucket}
All 3 drains are connected into one line and the catch is a 5 gal bucket. Near the door.
The res is also just a 5 gallon bucket by the door I mix up daily as I'm only feeding small amounts like approx less than 250ml each morning.
I have two 100liter black Chem resistant, uv resistant resevoirs IL be switching out and bubbling tap water as needed
The feed line is coming from a pump I the res to 3/4 inch black hose to the end of the third table with a plug in the end.
Then I have 1/4 inch straight push in connectors into the 3/4 line then I put my 1/4 line on the connectors then to my plant where it's heald in place with a stake. Also I put a tee at the end for a better spread. IL be moving this around f during the Grow for even wetness