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.

Dear Customer, Thanks for your inquiry. The 1.5-meter long one has an inner diameter of 16mm and an outer diameter of 21mm; the 6-meter long one has an inner diameter of 4mm and an outer diameter of 6mm.