I've kept freshwater
fish tanks for several years and, on the whole, have been successful; but I keep having problems with neon tetras. If I buy half a dozen, they gradually die off, one at a time. After all but one blue neon died this last go-around, I tried adding six black neons, and now, again, all but one have died. The one blue and one black neon suvivors seem to be doing fine, but I can't seem to keep them in any numbers.
The tank they are in is mature, having run for several years now, with many of the fish being the original ones.
I'm curious to know if others have had similar problems with neons, and what people do who have had good success with them.
My tank information is as follows:
Tank capacity: 30 gallons
Tank configuration: Tall
Whisper Power Triad 2000 filter (activated carbon changed every two water changes)
Water Source: Minnesota River, filtered by Minneapolis system
Water Temperature: 78 degrees F
Water care: 25 percent water change every three weeks
Water Treatment at Each Water Change:
2-3 drops NovAqua per 10 gallons
1/4 tsp Bausman fish tonic per gallon of tank capacity
pH: 7.5 (buffered by small bag of crushed coral in filter)
Feeding: Twice daily, a couple pinches of combination “Nutrafin Complete Flake Food for All Tropical Fish” and “TetraMin Tropical Granules” (or similar food)
1 Congo tetra
3 skirted tetras
1 blue neon tetra
1 black neon tetra
3 small feeder gold fish
NOTE: I started adding the Bausman fish tonic at the recommendation of a worker at a fish store, after I explained my neon tetra problem.