Another very helpful post from Jayball, to whom, thanks!
"I lost track of where the post is but this is a good refrence for PAR and a few other lighting terms.
http://www.buildmyled.com/about-par/
The owner presented at MACNA in 2014:
https://www.youtube.com/watch?v=C7rpUQEorDU
Hope this helps,
Jason"
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Sk8r
Salinity 1.024-6; alkalinity 8.3-9.3 on KH scale; calcium 420; magnesium 1300, temp 78-80, nitrate .2. Ammonia 0. No filters: lps tank. Alk and cal won't rise if mg is low.
Current Tank Info: 105g AquaVim wedge, yellow tang, sailfin blenny,royal gramma, ocellaris clown pair, yellow watchman, 100 microceriths, 25 tiny hermits, a 4" conch, 1" nassarius, recovering from 2 year hiatus with daily water change of 10%.
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