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Reopening this thread! Any way to calculate how much ro/ di water is needed to reduce salinity from 40ppt to 35ppt? Thanks in advance!You're welcome.
Happy Reefing.
Reopening this thread! Any way to calculate how much ro/ di water is needed to reduce salinity from 40ppt to 35ppt? Thanks in advance!
You’re an absolute legend thanks so much for your quick reply! I panicked and ended up adding water progressively then checking salinity. I’ve lowered it to 35ppt in about two hours Everything seems fine. Corals didn’t show any signs of being upset. Apart from my acan. Fish seem fine too. Clown fish flashed for about 10-15 minutes but they seem at ease now. Let’s see tmrw! I’ll keep you updated thanks again.Sure, but it depends on how you do it.
Adding water then remove: You raise the total volume to 40/35 = 1.14 of what it previously was. So if total water volume is 100 L, you need to raise the total volume to 114 L, and then remove 14 L if you want.
Remove then adding water: you reduce the volume to 35/40 = 0.875 of the total current volume. So if it is 100 L, reduce the volume to 87.5 L, and then replace with RO/DI.
Of course, in neither case would you do this all at once if there are organisms present.
And by the way, you seem to be very very knowledgeable so while I’m here I’ll also ask you this, do you know what these are by any chance? It looks like rolled snails of some sort they’re a bit everywhere.Sure, but it depends on how you do it.
Adding water then remove: You raise the total volume to 40/35 = 1.14 of what it previously was. So if total water volume is 100 L, you need to raise the total volume to 114 L, and then remove 14 L if you want.
Remove then adding water: you reduce the volume to 35/40 = 0.875 of the total current volume. So if it is 100 L, reduce the volume to 87.5 L, and then replace with RO/DI.
Of course, in neither case would you do this all at once if there are organisms present.
That's pretty fast, normally I wouldn't go faster than 1 psu per 24 hours.You’re an absolute legend thanks so much for your quick reply! I panicked and ended up adding water progressively then checking salinity. I’ve lowered it to 35ppt in about two hours Everything seems fine. Corals didn’t show any signs of being upset. Apart from my acan. Fish seem fine too. Clown fish flashed for about 10-15 minutes but they seem at ease now. Let’s see tmrw! I’ll keep you updated thanks again.