Clown Died For No Reason? PLEASE Help!

[first-timer89]

I woke up thismorning and my clown had passed. I just transfurred him from a 20 gallon to a 75 gallon. this is what i have.

1.5 inch sand bed
15 pounds of fiji lr
had 1 clown
about 60 watts of lighting

and my water tested at...
Temp.=80
nitrate=10
Nitrite = 0
PH =8.1
Ammonia=less than .25

Does anyone Know what could of caused my favorite fish to die?
and does anyone have any suggestions on what to do next?
i know i need more lr but What fish and inverts too add?
going to store in about 15 minutes so quick help would be greatly appretated

TIA

 

[seaham358]

How did you acclimate the fish to the new tank? Did you just toss him in? How old is the tank. With amm present is it still in the cycle?

 

[first-timer89]

i acclimated him for 1 hour and the tanks water was the same. the only difference between the two was 1 degree!!! the tank is about 3 weeks old and the ammonia is just from him dieing. The day before the ammonia was 0!!!

 

[grimlock3000]

What has been your process for setting up the 75g tank and what is in that tank now? Sounds possibly that the 75g was not ready for fish yet

 

[first-timer89]

RO water
day later salt
3 days later sand from old tank and new sand
5 days later lr
3 days after the fish

 

[seaham358]

Did the tank Cycle? Not saying thats what killed the fish.
Cylce amm, nitrite, nitrate did you get them all yet?

 

[seafan]

Were you trying to cycle with the clown. It is possible it just couldn't take it, look at the articles for the fishless cycle.

 

[RocketSeason]

maybe some unknown chemical in the water? are there other fish or inverts in there now?

 

[first-timer89]

no other inerts and i had a mini cycle. The ammonia did not spike more than .25 when i first added the fish.

 

[quarryshark]

What was the PH difference between the 2 tanks. PH shock can kill very fast.

 

[first-timer89]

the same ph in the 2 tanks
I am soo puzled :x

 

[first-timer89]

I still cant figure it out!! my readings are perfict!!