Harry,
As you may (or may not?) have noticed, John has been replying to Nora, who
is much of a beginner in the hobby. I notice that she is even asking many
question to gain as much knowledge as she can here, and so, deserves all the
help she can get. While your methods may work for you, and may also work
for me, I surely won't recommend not vacuuming the gravel to a beginning
hobbyist such as Nora.
I'm sure you're quite aware that one of the beginning hobbyists' worst
problems when they first start, is to overfeed their fish. While we hope Nora
doesn't fall into that classification, until she learns better over time on
how to feed her fish properly, there's a good chance that she may overfeed,
at least on occasion. With a pH of at least 8.0 or higher (she thinks it may
be as high as 8.2) it wouldn't take any more than a 0.25 ppm level of Total
Ammonia for it to be toxic to her fish at this pH (and an even much lower
level at pH 8.2). I see it as being too risky for a beginner not to vacuum
the gravel to ensure any leftover food is cleaned up and doesn't sicken her
fish. I would not recommend foregoing this important maintenance procedure
for a beginner. They're spending hard earned money on fish that they're
putting to risk, when they are still learning how to properly feed their fish,
if they were to ignore a basic beginner tank maintenance procedure.
Yes, the cycle "starts" right out in the open, in the water column -- and
on all.surfaces including the gravel, the interior glass panes and the
filter. It very soon migrates to the filter as its populations increase there due
to conditions being more favorable to their multiplication at that
location, even though nitrifying bacteria will always reside in the water and on
other surfaces. For nitrifying bacteria to once more multiply in mid-water
after a cycle has been established (in the filter), this is generally seen when
a mini-cycle is taking place, and the conditions causing this should be
avoided whenever possible. Fortunately, it looks like this is a
greenish/brownish cloud which would appear to be a type (or types) of suspended algae --
even though this too should be corrected.
Ray </HTML>
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We Thank You in Advance for Your HELP in this matter.
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