09-30-2011, 08:51 AM
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First thing I might do is see that ammonia and nitrites are zero daily.
I might reduce feedings to once a day or every other day with fresh flake foods that contained spirulina and or algae for the guppies,platy's, mollies.If food is old,,I would throw it out.
Would lay off of any meaty foods for a while and maybe stick with veggie flakes and occasinal once a week frozen spirulina brine shrimp.
Would wonder what hardness of water is, if ph is less than 7.5, and hardness less than 12 DGH, then perhaps the water does not suit their longterm health for they need rather hard alkaline water.
Might also consider that fancy guppies are not all that hearty in best of condition's .
They are bred more for finnage,and coloration, than for improving, or stenghtening the strain.
Is wise to quarantine, and then introduce new males or females every so often to prevent inbreeding and weaker genetics from same. (new blood ).
If I was unsuccessful with above, coupled with every week, once a week water change, and disease persisted,,,spread,,,then I might consider removing all fishes (euthanize),and let the tank run without fishes for a month. Perhaps adding a pinch of fish food every other day to keep biological filter ticking.
Many parasites and or pathogens (not all) that affect the health of fishes cannot survive long without host fish or fishes to infect.
This does not alway's work but I would try this before tearing down the 50 gal tank ?
Last edited by 1077; 09-30-2011 at 08:54 AM..