Discussion in 'Water Chemistry' started by scottmwoods, May 12, 2013.
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this is the tank pic
I also have the apex reading it. it has been cal. it reads the same as the hydrometer. but the refactrometer is off.
I have also notice that my skimmer cup gets full every day and needs to be cleaned out.
Well if you are reading salinity through your Apex, then you should be good. But just relying on a hydrometer would not be wise IMO. Either way, your salinity is still on the low side. Get it up to 1.025. Top off with salt water to slowly raise it.
Thanks, I will, I did not want to take it up that high. I thought that would be bad for the fish. I did read that in other post about for reef tanks need higher salinity.
1.025 isn't really that high.
I keep all my reefs at 1.027-1.028. Corals and fish thrive.
Even in my Marine Biology lab, we use Instant Ocean Hydrometers for quick tests. It proves to be very accurate believe it or not.
If the Hydrometer is calibrated it is fine.However they can go bad as they get older so calibrating it often is advisable.I would not run the salinity higher then 1.026.
I have the salinity up to 1.025.
I also got Marine Depot Aquarium Pro Refractometer
APEX, Refractometer, Hydrometer all match.
all of the water parameters are the same but the corals don't look any different. except one more seems to be dying off.
How long has your tank been up & running. What lights are you using? Did you photo acclimate your corals? Looks like your frogspawn heads are bleaching out along the top. That's why I'm wondering if its your lighting. Plus I would think that two mp40's might be a lil heavy in a 90. It's good for sps but not lps & softies.
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