Hello I am a new member here but i have been browsing the forums for quite awhile.
I recently set up a new 6x2x2 680L tank. everything was going great but about 2 weeks ago ive started to have alot of fish deaths. It all started when i added some swordtails without quarantining them
. I added about 10 of them to my tank and the next day i noticed a a female that had a sort of growth on her side with some scales peeling off i put her in a hospital tank with melafix thinking it was a bacterial infection and in the meantime no other fish died.
3 days later i checked on her and she was barely swimming and she had lost alot of scales but the growth itself was the same she died about an hour later. ever since then i have had fish dying left right and centre. I checked my water parameters with a API master test kit and the only thing out of the ordinary was a slightly raised ammonia which i quickly corrected with a water change. I then got my water tested at my LFS and explained my situation to them they said my water was perfect and i was told to raise my temp to 28C+, double dose API Stress Zyme+ to help with any stressed fish and do a 50% water change. all went well for about 4 days and then fish started dying.... again.
Sooooo Long story short i just lost 4 more fish today when i got home from work and once again NONE of the fish showed any signs of illness or stress except my female betta lost her colour yesterday and then died today. I am pulling my hair out i cant figure out whats wrong!!!
My water perimeters are...
ph 7.8 (thats my native PH)
I normally do a 30% water change weekly and dose Seachem excel and seachem iron. I have a gravel substrate with SERA florenette A root tabs (have ferts because it is a planted tank obviously)
filtration 600lph internal filter with carbon sponge media and a 2000lph canister filter bottom tray: filter floss next tray: 1ltr seachem matrix next tray: 1.5kilo mini ceramic noodles top tray: filter pads
Lighting:1x 10000k t5ho fluorescent fitting 2x36w tubes and 1 12000k Epistar HO led fitting both on a timer for 10hours a day.
My current survivours are:
4 angels: 3 medium 1 small
1 6-7cm albino bristlenose catfish
4 orange buffalo barbs
1 honey dwarf gourami
1 true Siamese algae eater
1 peppered corydoras
I know its a big post but any help would be greatly appreciated!!!!!!!