Replacing activated charcoal in an air filter

[MGGrows]

For an activated Charcoal filter:

1. How long do they typically last?
   2 Is there a way to replace just the charcoal?
2. For a 2’ X 4’ X 6’ shed, is a six inch filter OK for three to four plants?
3. Because of high heat, is putting the filter on the floor a good option?
4. Space is limited, is making my own flat filter to sit on top above the lights worth the cost and trouble?

Thanks in advance,
MGGrows

[Paranorman]

@MGGrows

For an activated Charcoal filter:1. How long do they typically last?2 Is there a way to replace just the charcoal?3. For a 2’ X 4’ X 6’ shed, is a six inch filter OK for three to four plants?4. Because of high heat, is putting the filter on the floor a good option?5. Space is limited, is making my own flat filter to sit on top above the lights worth the cost and trouble?

1. I’ve heard varied things but I think the best answer is when you start smelling it not working

2. I think it depends on what type of filter, the ones that are reversible supposedly you can change it, I haven’t tried it yet

3. yes

4. No, the higher the better (heat rises, take the heat out from the top of the tent

5. not sure

-best of luck!