The Planted Tank Forum - View Single Post - Convert Lux meter to PAR meter?
View Single Post
Old 06-21-2012, 05:38 PM   #43
plantbrain
Planted Tank Guru
 
plantbrain's Avatar
 
PTrader: (255/100%)
Join Date: Dec 2003
Location: The swamp
Posts: 13,334
Default

Quote:
Originally Posted by Hoppy View Post


This shows the dot marked "cathode". Is that the positive side?
Cations are + eg K+, Ca++ etc........metals.........good way to think about it for some.
__________________
Regards,
Tom Barr
plantbrain is offline   Reply With Quote