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Description
TrolMaster | CO2 PPM Controller (BETA-8)The TrolMaster BETA 8 CO2 Controller (BETA 8) offers a precision CO2 NDIR sensor controller in an affordable easy to use package. The BETA 8 features a high quality remote CO2 sensor (with 16ft cable) and built in photocell to automatically activate your supplemental CO2 system to maintain CO2 PPM levels only during daylight hours. The BETA 8 also has adjustable deadband and min max recall. It also has a fuzzy logic feature which will more accurately
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.9 ★★★★★
Based on 934 reviews
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Product Reviews
★★★★★ 5
Big fan!!!
Format: Paperback
Such a wholesome story great for all ages. I've been a fan of Meesh for years on Instagram and when I saw there was a book... I HAD to get it. I read it in about an hour with interruptions form a puppy. I absolutely love the illustrations and story. The quality of printing was fantastic and I am looking forward to the next one!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2023
★★★★★ 5
Fun and engaging book!
Format: Paperback
This book was just what my 8 year old was looking for. She loved it! She has a great imagination and loves to play, but not always read. This held her attention and she finished it in a day! Now she’s begging for the second book!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 18, 2025
★★★★★ 4
Adorable
Format: Paperback
Thank you Knopf Books for Young Readers and NetGalley for the advanced electronic review copy of this adorable book. This gorgeously illustrated story is about friendship and working together to solve problems. Can’t wait to share it with my students!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2023
★★★★★ 5
fun, diversity filled, read
Format: Kindle
I think this was a great fantasy book with lots of magic about friendship, courage, and finding your identity, whatever that may be. I liked how even if demons seemed bad at first, they are just different. Everyone is.
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Reviewed in the United States on June 21, 2023
★★★★★ 5
So engaging. Couldn't put it down.
Format: Paperback
I read this book in one sitting. It's thrilling from the beginning to the end. Beautiful art, wonderful storytelling and just a wonder to read.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 27, 2023
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