Making it possible to disable farm tile and more

[Fenixix]

I suggest making it possible to disable\enable farm tile. I want to grow mealwood. I decided to use farm tiles because planter box give -10 decor + take more space than farm tiles since you need floor underneath it and hydroponic farm provide water to plants and it is useless if you are growing mealwood. After some time when i got my fridges filled with food i didn't need as much production anymore and i decided to turn off some farm tiles but it wasn't possible. There are two options either make farm tile able to be disabled or enabled or make hydroponic farms be able to work without pipes connected so that i can plant mealwood. 
I would like to see a tile that let water flow but not gas. It would let me to empty polluted water pockets without letting polluted oxygen out or liquify gases. For instance if i want to liquify chlorine for whatever reason (takes less space if stored in liqued form for example) i need to build a closed room where i pump gas and as it cools down it flows out where i put those liquidflow tiles.
Many suggestions on the forums are kind of a "solution" based on "problems" like gas managment, water managment, temperature managment, etc. All these are great and make the game more fun to solve but what is essential and create all this variety of suggestions are those problems, so i hope developers have many ides for "problems".Thank you for reading. Have a nice day!