How long does Frozen juice keep in freezer?

I have some frozen fruit juice i make from fruit and milk and bit of water how long does it keep in the freezer.

What Is The Distance You Keep Ott-lites Over Wheatgrass Plants To Grow Them Indoors?

I want to start growing wheatgrass plants indoors with ott-lites, the set up will be rows of them, filling a 15×15 space. is the whole room being lit up by ott-lites efficient to grow them (or any other plants)or does it need to be really close to the plant.
This is a very important project to me, I ask please that only those with this experience answer,not opinions,
Thank you

How Do I Keep My Wheatgrass From Molding?

I grow my own wheatgrass in 12″x6″ pan w/ holes in the bottom for proper drainage. The wheatgrass is planted in 1″ soil and is lightly watered whenever it gets dry. It always ends up moldng! Help, please.