[APD] Re: Bacterial Bloom

[Paul Krombholz <krombhol at teclink_net>]

If it really is a bloom of bacteria, then Daphnia will filter them 
out and start producing eggs.  Take a sample of the water and 
introduce some Daphnia.  Observe daily to see if their ovaries get 
large and then release eggs into their brood pouch.

If it really is a bacterial bloom, then there must be some source of 
organic food in the tank.  Do you have DIY CO2 made by yeast?  If so, 
the pressure may be pushing some of the yeast culture bottle into the 
tank.  If that isn't a possibility, what about overfeeding?  It is 
hard to believe that a small bit of driftwood could release enough 
organic matter to cause a bacterial bloom.

If it really is a bacterial bloom, then there should also be 
bacterial films on surfaces.  The protozoa population should 
increase.  It should be possible with a hand magnifier to see 
surface-feeding ciliates moving around and often clouds of 
free-swimming protozoan species as well.  Pond snails love bacterial 
films and grow rapidly when there are bacterial films to eat.

If it is not a bacterial bloom, then it must be a suspension of 
non-living particles.  If you put some of the water into a glass, 
does anything settle out after a few days?
--
Paul Krombholz in sunny, mild, central Mississippi
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