VEVOR DWC Hydroponic System, 5 Gallon 5 Buckets, Deep Water Culture Growing Bucket, Hydroponics Grow Kit with Pump, Air Stone and Connected Reservoir, for Indoor/Outdoor Leafy Vegetables

This is described in detail in the user manual, which you could review:<br/>https://d2v0huudrf11kh.cloudfront.net/1622618201666%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20210601173008.png

It has aeration stones. You just need to open the valve. When closing, for example, if the bucket is to be removed, the valve must be closed, and it can be dismantled. More information can be found in the files in the link: https://d2v0huudrf11kh.cloudfront.net/1622618201666%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20210601173008.png

If there is no water pump, there will be no circulation function.

We do not sell parts separately. All our products have a 12 month warranty and if there is a problem with your purchase during the warranty period, we can send you a replacement part free of charge(Except for consumables). Please click the following link to contact us: https://www.vevor.com/pages/contact-us.

Fill it up so that the basket is 1/4 inch underwater. I think it's about 4 gallons. The sight pipe that sits on the outside will be all the way full.

First fill I fill it so the nutrient solution touchs the bottom of the built in net cup. Once the plant is established and is using a lot of nutrients I fill it to either half or 3/4 full. It depends on what you are growing. Tomatoes and cucumbers tend to use a lot of water so I do those at 3/4 to save me from filling it up too much.