So I followed the rule of 1/2 cup per gallon in my 30 gallon barrel to do a water change and let it mix overnight, now I suck at math but assumably that would be 15 cups total wouldn’t it? woke up to it being at a salinity of 1.035, what did I do wrong when mixing my reef crystals?
Comments
Sign in to leave a comment
No comments yet
Be the first to start the conversation.
@AnthonyStsnislawcyk63773
1y
you didnt check you you salinity after you were done mixing
@Sarah177
1y
It is possible that some water evaporated if you didn't keep a lid on it. Just add some more RO water and you'll be okay but it really doesn't take much to make it swing so add a little at a time and retest
@ocellaris
1y
Salt can be compacted or absorb water from the air during storage and in general the density is not guaranteed. That's why you always use a refractometer to check it. I weigh out the amount of salt I need on a scale for my mixing bucket and it's much more accurate than volume measurements, though even then the weight can be off due to water absorption from the air, so I ALWAYS check with a refractometer after letting it sit.
@SandnRocks
1y
Its a 30 gallon barrel if its filled to the top. You look like 5 gallons short which would account for the extra high salinity if you put in 15 cups instead of like 12.5 or something. My thinking anyways
Sign in to join the conversation.
I usually add a bit less than I think. Then test with a refractometer a few min later. Then repeat that until it’s where I want. Then let mix over night. Test again with refractometer and make minor adjustment if needed.