View Full Version : 1.021 help !!!

pura vida mi
03/03/2010, 11:10 PM

7 months into hobby, and all parameters have been in check with only a few spikes of nitrate, low PH. Or so I thought.....

Well I recieved calibration fluid today and my refractometer read 1.021 AFTER calibrated. All inverts/corals/fish have been doing great. Snails/crabs/sand sifting starfish/cleaner shrimp all good - no die off. Actually an explosion of late of stomatella snails.

Don't want to overreact, thinking of testing at LFS tomorrow. Thoughts/suggestions.....

Also received a TDS meter - what is ideal for TDS?
Thanks in advance

03/03/2010, 11:19 PM
If you confirm you SG, I would just start replacing your evaporation with salt water. 1.021 really isn't dangerously low if everything is looking okay. Shocking your system would be a much bigger problem. I would defenitely bring it up, but just do it by using salt water for top-off (if you know for sure that it is too low).

The TDS meter is used for your RODI water. 0 is ideal, but a lot of people are content with 3-4 ppm. The TDS of you tank water would be extremely high. I don't think it is practical to use a hobby grade TDS meter to check salinity. Good luck

03/04/2010, 12:11 AM
1.021 is not bad just slowly bring it back up to 1.025, I have measured some Lfs around here and the fish water in the bag read 1.016 and the water in their coral tanks 1.030.

03/04/2010, 02:10 AM
Agreed. Get your water tested at your LFS to confirm your readings. If correct top off with salt water. If not correct, recalibrate your refractometer. Oh yeah, and most importantly relax.........:reading:

03/04/2010, 07:12 AM
Are you mixing your own saltwater? Most (if not all) salt mixes have a ratio of about 1/2 cup of salt per gallon of water which will bring your SG to 1.021

pura vida mi
03/04/2010, 07:46 PM
Thanks everyone. Confirmed today at LFS that my refractometer was indeed reading high. Topping off w/saltwater (started today) & will monitor unitl 1.025 is reached.

I use Seachem Reef Crystals - just was mixing low due to refractometer.

I love the relax direction the most!

03/04/2010, 07:53 PM
I had the same problem:


03/04/2010, 07:58 PM
Yea just top off with saltwater and you will be fine.