dying fish

[ST3PH3N]

Warning, if u wear reading glasses place them over your eyes now....sorry its long...really long


I'll start off by telling u whats new because it may help. As of yesterday at 7am my fish were put into a plumbed 40 breeder with 20g sump. Out of the old 46g almost all water went between the 40&20, all sand was used. Water was very cold this morning around 73-74 degrees when I woke up ( I have two heater running in sump plus heat of return pump) and I noticed my six line wrasse was laying on his side breathing hard. I looked around and my very very very nice powder blue was dead on his side. Idk what happened?I'm a little upset because the pb and six line had tons of character. I was thinking the coldness, the plumbing? Idk they were fine for a 24 hours till this morning. My 2 clowns and clown goby are fine along with mandarin and scooter.
Thanks you,
Stephen

[ST3PH3N]

ammo 0
nitrite 0
nitrate .5
other perameters are the readings for sa tap water as far as alk, ph, and hardness.

[ST3PH3N]

all my inverts are fine too, well can't see harliquin's they hide

[engwife36]

How deep was your sandbed in the old tank? Also, how long was that sand in your old tank?

[ST3PH3N]

the sand bed was about an inch deep in most spots and around 5 months old

[Lightning Whelk]

most likely an acclimation problem.

[ST3PH3N]

they would be fine for a whole day then die? They were eating and swimming just fine when I went to sleep.

[crossxfire2]

the temp wasn't THAT cold, but they probably were not used to such a fluctuation?

[JLiu]

What did you use to clean the tank out with before you moved systems?

[ST3PH3N]

What did you use to clean the tank out with before you moved systems?

the drilled tank? Just rinsed it thoroughly with warm water