30g QT - All 3 died. Bumming.
I have a 30g QT setup with just a heater, circulating pump and HOB filter with white cloth. 29g Biocube DT has cycled and sitting devoid of fish or coral.
Week 1: Added Cardinal, yellow clown goby and firefish. On day 5 Cardinal and goby died. Didn't realize the white cloth had turned brown. Did a 50% water change, changed cloth. Firefish recovered.
Week 2: Firefish looking good, eating well, small amt ammonia present did another 50% water mid-week, swapped out filter cloth for new every 2 days.
Week 3: Firefish still doing well, did another 50% water change after amall amt ammonia detected while continuing to swap out filter cloth. 2nd day after water change, 3.5 weeks of QT, firefish died. Ammonia zero after each water change.
WTH? Was it because I bought the fish at costco even though my costco seems to be well kept and no sick fish in their tanks? No sign of disease. Didn't even appear stressed. All appeared well after first 2 died. I know this thread talks about a cycled QT and I was setup more like a hospital. THoughts? Suggestions? I can't believe I am back to square one and have to start a 4-6 week quarantine again or much longer if I have to cycle a QT. Bumming.
I have few questions for you.
1. did you cycle the QT? i read later as no..
2. did you acclimate the fish before introducing to qt? salinity, temp and pH?
3. white cloth???? do u mean floss?
here are few concerns that stand out.
first off if qt is not cycled then adding fish to that will take a lot more than 50% water change every week or so. A non cycled tank will probably need to have water changed almost on daily basis with large quantities (50-75-100%) depending on bioload.
secondly changing your only source of bacteria harboring media (floss in ur case) in the middle of non cycled tank that is trying to cycle is invitation to trouble. that floss is starting to harbor bacteria and once you rinse it or replace it tank goes right back to cycling again day 1.
all across i see ammonia which is the number one cause of your fish being dead in my opinion.
here is what i would do if you are going to keep a hospital tank uncycled.
Place some floss in the established tank so it gets bacteria living in it.
one hospital tank is needed put together the tank, place water and equipment in it and move the floss from your main tank to hospital thus giving you an instant cycle, uses seachem stability to promote bacteria.
another way would be to setup a hospital tank and have a lot of water ready at same salinity temp pH as the hospital.
Do small amounts of water changes through out the day and do not let ammonia build up at all. ammonia in any concentration is deadly to fish burning gills and organs inside killing fish over few days to hours.
All these methods should be practice with the assumption that fish are bought from good source and arrive healthy. after temp acclimation salinity and pH acclimation is must as well. most fish store keep salinity low and a sudden salinity jump will throw fish into salinity shock.
Seachem Stability is a very good product which gives boost to bacteria and take new tank symptoms away.