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tmz · 11/03/2017, 11:09 PM

1.026 is best, IMO; it's the average for seawater. Note, all animals rely on an internal sg to maintain live sustaining biochemical activity. Invertebrates can't osmo regulate like fish can by drinking and urinating and via their kidney functions; so ,for the animals like corals that don't osmoregulate their internal salinity is highly dependent on the surrounding water;if it's saltier than their internal sg they will loose fluids like a pickle; if it's lower it will flow into them and lower their internal sg. Either way it messes up their homeostasis which is necessary for life .

11/03/2017, 11:09 PM	#32
tmz ReefKeeping Mag staff Join Date: Apr 2006 Location: West Seneca NY Posts: 27,691	1.026 is best, IMO; it's the average for seawater. Note, all animals rely on an internal sg to maintain live sustaining biochemical activity. Invertebrates can't osmo regulate like fish can by drinking and urinating and via their kidney functions; so ,for the animals like corals that don't osmoregulate their internal salinity is highly dependent on the surrounding water;if it's saltier than their internal sg they will loose fluids like a pickle; if it's lower it will flow into them and lower their internal sg. Either way it messes up their homeostasis which is necessary for life . __________________ Tom Current Tank Info: Tank of the Month , November 2011 : 600gal integrated system: 3 display tanks (120 g, 90g, 89g),several frag/grow out tanks, macroalgae refugia, cryptic zones. 40+ fish, seahorses, sps,lps,leathers, zoanthidae and non photosynthetic corals.