hey has any one ever used these and are they accurate i think ima buy 1 of each and see if they get the same reading
http://cgi.ebay.com/Digital-Aquariu...666?pt=LH_DefaultDomain_0&hash=item2a10107212
http://cgi.ebay.com/New-Aquarium-LC...572?pt=LH_DefaultDomain_0&hash=item45f2588b7c
http://cgi.ebay.com/Digital-Aquariu...666?pt=LH_DefaultDomain_0&hash=item2a10107212
http://cgi.ebay.com/New-Aquarium-LC...572?pt=LH_DefaultDomain_0&hash=item45f2588b7c