People in my tank are fussed

[aquadonkey]

Can you help me trouble shoot?
I have a few things that seem to indicate problems in my tank:
1)blastos and one (of four separate) frogspawn have been semi-closed for about 3 days
2)both RBTAs are on the move as of today
3)fish seem to be fighting more than normal (clown pair esp.)
4)cyano.....

Two of the problems I know of - I had forgotten to change my chemi-pur (past the recommended usage - I think it says 6 months on the bag and I had it in for about 8). I took it out last night and replaced it with a small bag of carbon in the filter sock. Second problem is just as of last night and is maybe (?) the cause of the nems moving - my SG dropped during my 10%WC. My made-up saltwater was a little low (1.020), but I decided to go ahead and change any way since something seemed to be wrong. The SG was 1.025 yesterday, today it is 1.023 - oops. I plan on topping off with SW until it rises back up. Here are my params (at least the ones I have tests for):
temp: 78.4
SG: 1.023
Ca 430
KH 8.2
NO3 .5

Thanks!!

 

[Dave VG]

LPS do not do well with low SG. Once you bump it up to 1.026 you should see an improvement. I have had first hand experience with this twice no less. Lost a torch and a hammer on two different occasions to low SG. That was the only parameter that was off both times due to stuck float valve. Good luck lizz

 

[RandyO]

I'd agree with Dave. Get your salinity back up. Just top off your tank with salt water and let it slowly evap. to get the level up. Quick changes are added stress to the animals.

 

[superkat]

agreed. betcha you get happy campers real soon.

 

[aquadonkey]

Thanks for the replies everyone - SG is already up after topping off with SW for a day - 1.024 now. What concerns me is that these two corals were unhappy already for about 2 or 3 days before I accidentally dropped the SG.
I'm going to take a water sample into the LFS - anything else I should be looking for? Mag? Phos?
Also - my bulbs are about due to be replaced (9 months old) - could this be the problem?

 

[superkat]

don't know if that's the entire problem, but could add to it, Lizz. Just changed out my bulbs ($ouch$) and it is already making a difference, although i did have some loss before I realized the problem.