Fishes & shrimps died suddenly

[Fuzz]

Hi All,

any advise?

I've checked perimeters...

Calcium 360 ppm

Carbonate Hardness 9 dKH

Alkalinity 3.2 meq/L

Magnesium 1500 mg/L

Phosphate 0 mg/L

pH 8.4

Salinity 1026 35PPM

Nitrate na mg/L

Nitrite na mg/L

Ammonia na mg/L

What could be the cause??

Also noticed that most of my polyps are not opened even when lights are on... and the feather worms seems to be very frail when open up... it's a sure sign of stress but what could be the reason?

I lost my purple gramma, yellow tang, yashas, gobies, cleaner shrimps, blood shrimps, ###### shrimps in a span of 2 days... please help!!!

Done 25% water change already...

[Achilles Tang]

Any possible form of contamination?

Anybody sprayed insecticide or window cleaner around your tank?

Throw some new carbon into your sump and add a polyfilter.

[eques]

there may be CU oxide or other metals oxides. put cuprisord (seachem)

[Reefbum]

Hi All,

any advise?

I've checked perimeters...

Calcium 360 ppm

Carbonate Hardness 9 dKH

Alkalinity 3.2 meq/L

Magnesium 1500 mg/L

Phosphate 0 mg/L

pH 8.4

Salinity 1026 35PPM

Nitrate na mg/L

Nitrite na mg/L

Ammonia na mg/L

Bro, whats your figures for the three most important parameters? What you mean by na? Zero?

[strat]

No no bro! What happened?

How about the rest of the corals?

[untouchables]

Fuzz, think hard and list out what u did the last 2 days prior to your tank crash. list out everything, even if it is dipping ur hands into the tank. this way, we can try to see what could have been introduced that caused the death.

[Fuzz]

corals are abit stress but much better today... zoos still closed but stems are extended and longer than normal... mushies, clams, yumas, rics are all ok... I think it may be that I stop topping up RO water + CO2 accidently disconnected + I did spray sheltox in my living rm cos got mosqitoes...

I also changed my carbon to new ones... did a 25% water change... fed my BTA with the deceased harlequin and cleaner shrimp...

found my blood shrimp still alive today... the only shrimp surviver...

Ammonia, Nitrate, Nitrite tested 0...

Will probably try to test for copper...

Could my BTA release toxic??

Also, just added xenia and montipora the last 2 days... could they be the cause?

[strat]

Good to hear that the corals are ok.

Adding a monti and xenia dun lead to crash AFAIK.

BTW, do you have a sea cuke in your tank?

[surfedelic]

Sometimes when you change water and pour in immediately ... you will notice some LS die off. Especially the tiny crabs - they will be the first sign of trouble.