Can't figure out what is killing my fish
Water params are all good (0 nh3, 0 no2, 10ppm no3, 1ppm po4, ph 7.5, kh 5 or 6, gh 12ish) - using dry ferts to maintain those levels, testing every other day - adding a tiny amount of trace (CSM+B) and K+Iron 2x a week. Drop checker nice and pale green. Plants pearling as they should.
Med-light, cycled tank (2+ months), moderately planted
Journal is here:
http://www.plantedtank.net/forums/12-tank-journals/1156282-20h-noname-journal.html
All cheap fish, but I feel bad.... had 13 to start with (5 cherry barb, 5 neons, 3 rasbora), added 2 rasboras and 2 panda corys about a week later. About 2 weeks later, I would lose 1 or 2 a week. Only fish left from that batch are the corys.
Added 4 and then another 4 longfin zebra danios about a week apart. That was about 3-4 weeks ago. Now I've lost 2 of those. Put in 4 amanos which seem very happy. Corys are still fine (I think they are actually M/F - showing very obvious spawning behavior). So current stock is 6 danios, 2 corys, 4 amano in a 20H - nowhere near overstocked.
The ones that died would just get lazy and hang out at the top - looking normal, but not very active. Next day, dead. No sign of bloating, fin clamping, or anything. No signs of ick. A couple I noticed having some fast breathing, but not much else obvious.
Should I just dose the tank with anti-everything - did I get a parasite, or are there fungal/bacterial infections that don't have any visible signs? Is it just some sort of stress or bad fish (i.e. avoid those stores)? Old food?
My 5 gallon tank which uses the same tap water source is fine - mostly algae-free, and happy, year-old fish. No CO2 or ferts in that one tho - just a single T8 over that one.
Water params are all good (0 nh3, 0 no2, 10ppm no3, 1ppm po4, ph 7.5, kh 5 or 6, gh 12ish) - using dry ferts to maintain those levels, testing every other day - adding a tiny amount of trace (CSM+B) and K+Iron 2x a week. Drop checker nice and pale green. Plants pearling as they should.
Med-light, cycled tank (2+ months), moderately planted
Journal is here:
http://www.plantedtank.net/forums/12-tank-journals/1156282-20h-noname-journal.html
All cheap fish, but I feel bad.... had 13 to start with (5 cherry barb, 5 neons, 3 rasbora), added 2 rasboras and 2 panda corys about a week later. About 2 weeks later, I would lose 1 or 2 a week. Only fish left from that batch are the corys.
Added 4 and then another 4 longfin zebra danios about a week apart. That was about 3-4 weeks ago. Now I've lost 2 of those. Put in 4 amanos which seem very happy. Corys are still fine (I think they are actually M/F - showing very obvious spawning behavior). So current stock is 6 danios, 2 corys, 4 amano in a 20H - nowhere near overstocked.
The ones that died would just get lazy and hang out at the top - looking normal, but not very active. Next day, dead. No sign of bloating, fin clamping, or anything. No signs of ick. A couple I noticed having some fast breathing, but not much else obvious.
Should I just dose the tank with anti-everything - did I get a parasite, or are there fungal/bacterial infections that don't have any visible signs? Is it just some sort of stress or bad fish (i.e. avoid those stores)? Old food?
My 5 gallon tank which uses the same tap water source is fine - mostly algae-free, and happy, year-old fish. No CO2 or ferts in that one tho - just a single T8 over that one.