Indoor reservoir

I have a drain table with my plants on top of the table with a drain hole leading into my reservior which is an open tray. 4x4x7 room. YES do exhaust and intake fresh air.

My humidity wont stay under 50%. I do have my reservior inside my grow room, which is uncovered and this is my thinking of why it could be humid inside the room.

1. Is an uncovered Reservior a greater cause to higher humidity?

2. Is haveing a covered reservior a better idea in general?

yes having a covered reservoir would be a better idea... helps prevent your water/nutes from evaporating .. ph/ppm levels wont flux so much and you could have to much moisture in the air with the open res. combined with any heat in the room which i would say is adding to your humidity problems.. but its really hard to know ... it could also just be the plants breathing lol which ventilation/de humidifiers etc could come into play... it might not be adequate with the ventilation you have setup

Also, Just added an exhaust underneath my drain table which is where my res. is located hopefully that will help

Thanks Stoney.

I did vent the undercarage of the drain table which is a sealed undercarage besides the actual drain hole itself and it dropped my humidity in my room from 60-70%
TO A PERFECT 40-50%!!

Went with the test it myself before asking techinque and that worked out just fine!