<span class="link_user">@Tylerjc713</span>,
I use a large Tupperware type res. I donāt know max capacity. I just filled with 25 gallons and marked a line. I donāt top off nutes in between drains. I drain my res every 7 days and add new nutrients. I grow in coco coir so I donāt have to clean stones. I clean my pump when I drain every 7 days.
