A
Anonymous
Guest
i have the knop and it works great, really pulls out the gunk fast. i don't know of any other so i can't make a comparison. i had a seaclone on the tank before and i'm happier with this one.
gtag('event', 'conversion', {'send_to': 'AW-972395556/RN4nCJnV4tkCEKSo1s8D'}); -->