best co2 regulator for planted tank

{"cid":"91149008","title":"The Best Storage Tank Solution for Municipal Sewage Treatment \u2013 GFS Tanks","imgUrl":"https:\/\/img.chinax.com\/nimg\/1e\/62\/fbe0ad0d56946c42c28a4e2c4f95-200x200-1.jpg","attrs":{"Price":"$5000~$20000 one set","Brand Name":"CEC TANKS","Model Number":"W","Minimum Order Quantity":"1set","Delivery Time":"10-30 days after deposit received","Applications":"Water , waste water, digester , reactor , grain , sludge , chemicals","Certification":"ISO 9001:2008, AWWA D103 , OSHA , BSCI","Place of Origin":"China","Payment Terms":"L\/C,T\/T","Supply Ability":"60 sets per month","Packaging Details":"PE poly-foam between each two steel plates ; wooden pallet and wooden","Size Of Panel":"2.4M * 1.2M","Adhesion":"3,450N\/cm","Roof available":"Glass fused steel roof , membrane roof, aluminum roof , GRP roof","Easy to clean":"Smooth, glossy, inert, anti-adhesion","Acid and alkalinity proof":"Standard coating suits for PH3 - PH11, special coating suits for PH1 - PH14","Service life":"\u226530 years","Steel grade":"ART 310","Corrosion Integrity":"Excellent","Coating thickness":"0.25mm~0.40mm , two layer of coating internal and external"}}

{"cid":"91163479","title":"Freezing drink tank for carbonated beverage production plant","imgUrl":"https:\/\/img.chinax.com\/nimg\/81\/b5\/844994ffb7d7c57dc22880275807-200x200-1.jpg","attrs":{"Price":"TBD","Brand Name":"Longway","Minimum Order Quantity":"1set","Delivery Time":"25days","Place of Origin":"chinA","Certification":"CE","Packaging Details":"Wooden case","Payment Terms":"TT","Supply Ability":"10SET"}}