Yes especially if it was snails that died, they'll go undetected a while usually and begin the tipping point. Ammonia events are fast, obvious and within a few hours total consequence.
This is the primary diagnostic we use in our cycling thread to discern no ammonia when one or more testers says there's some and it's been present three weeks straight (with all fish acting fine) always at some fractional level like .25 or .5
Conversely, we see primary bac blooms from errant carbon dosing all the time/ not a tank wiper
you werent using carbon, so a source for a bac bloom to take initial o2 is lacking.
Ammonia is the tank wiper. hard to guess what the cause was im just brainstorming a bac bloom isnt usually as deadly and fast.
This is the primary diagnostic we use in our cycling thread to discern no ammonia when one or more testers says there's some and it's been present three weeks straight (with all fish acting fine) always at some fractional level like .25 or .5
Conversely, we see primary bac blooms from errant carbon dosing all the time/ not a tank wiper
you werent using carbon, so a source for a bac bloom to take initial o2 is lacking.
Ammonia is the tank wiper. hard to guess what the cause was im just brainstorming a bac bloom isnt usually as deadly and fast.
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