Water
 

Any expired bottles of stuff?

I forget to mention that.i started the system back in 2010 and it was an LPS and zoa tank and i converted to an SPS tank last October.my first attempt at keeping sticks:wink: also this wasn't not my first crash.the first one was i think five-six weeks ago.the wife overdosed alk and raised the temp up cuz she said the water was cold.i've since corrected those issues and now this!hard times...hard times:cry:

a few KZ additives expires 2014 and a few are good til 2015.i should check my salt though...thank you for bringing that up

The system's old enough that a sudden change overnight means something went wrong with your routine.
You can do another water change or not, but I would not dose anything else until you figure out what could have gone wrong. I would do another water change.
Monitor the parameters, keep them steady. Alk swings are pretty hard on SPS.

Have you always been dosing Probido plus Zeo?
Is anyone advising you on dosing what you are dosing?

I will do another water change.i just recently started dosing prodibio about 7 weeks ago to control P04.with Zeovit additives, started dosing when i decided to keep SPS.i will closely monitor my water parameters and will post any changes that might/will occur down the road.it's just frustrating to lose almost everything over night.or maybe it's time to upgrade to a bigger?thank you,Mitch...

I would work on getting your SPS healthy again, after that problem a month ago. Work on tweaking the colors with Zeo or Probido after things have settled down.
If you're having PO4 issues, it could be from your sandbed. You might want to think about thinning it down to a half inch or so.
Sandbeds will work for a while while they're new and depending on your cleanliness routine can be left alone for up to a few years. After that PO4 will continually leach out.
IO is a basic salt, so you will need to add some things - Mg, Ca, Alk.
There's no guarantee that the SPS will come back.
Good luck!:smile:

i was fortunate that when the first crash occured i only lost a few frags,but this time i do not think so.i do dose Kent marine nano about 7.5 ml everyday.it think it's pretty clear that even though my tank is ready for SPS but i am not.so,i think i'll switch back to LPS and Zoas for the time being and start collecting sticks again,once i have enough experience with them.it was a gamble and a costly one too.thanks Mitch

LPS and zoas come from a different environment than SPS.

SPS need the faster water flow to massage their membrane tissue and help them process their waste products while LPS can expand and contract dramatically on their own in a slower, dirtier environment to accomplish that.

In larger tanks you can perhaps create both environments, but it's near impossible to do in smaller ones.

If you want to keep SPS in the future, I would suggest a separate tank set up specifically for that.

Any swing in alkalinity recetly? on the pic the coral look like it has some burnt tips?

hard to see on that photo though. What is wrong with the coral? is it only the tips or the base or something else?

Since the water went cloudy after the water change and you say there seems to be sand all over the corals I would suspect that there was an imbalance in the Alk/Ca and some precipitation happened.

Other possible causes of cloudy water are bacterial blooms and spawning events.

Recommended course of action would be water changes and test your Alk.

Cheers,
Tim