Yea the hose may look intrusive but with a UVC type pressureized
filter its important to get the flow down to the range it is
recomenmded to be at, and thats usually a lot less than what the
actual output of the pump is listed at, so its a good idea to use a
bucket and do a timed fillup of bucket of known capacity and see what
the discharge rate is at the water fall height. Slower is usually
better when it involves a UVC pressurized filter. You may be surprised
it should really be cut down on the flow even more even mnore than its
flowing now. Example. Hozelock Bio F0rce 1000 is rated at 1000 gph
flow, but add a pump (Cyprio Titan 800 is whats recomended with this
BF1000 filter, ) and the booklet on the unit says flow must be
regulated to a MAXIMUM of 500 gph for proper filtration and UVC use.
So, it means longer hose lengths, higher water fall, a valve after
pump but before filter unit if filter unit has a pressure indicator,
it maya gice a false reading if the valve is placed after
filter.........So check yur gph or whatever measurement you all use
in UK to make sure its not flowing too fast for optimol results.

To get flow GPH of pump after filter fill a known capacity
container..like say a 5 gal bucket, and time it in how long it takes
to fill that container.....Example 60 seconds to fill a 5 gal
container with hose end at 20" above water level, or a total of 44"
above pump itself. Divide 3600 by the amount of time it took to fill
bucket (in seconds) 3600 divided by 60 = GPH which would equarte to
gph of flow at this height.

You will probably find most pressurized filters recomend 1/2 of their
max rated flow rate is whats needed when using UVC.


And just for the record, if you got this far, I'm Roy.....;-) Kill
filters mean nothing



On Fri, 23 Jun 2006 17:24:51 +0100 (BST), "Rodney Pont"
wrote:

On Fri, 23 Jun 2006 13:50:01 +0000, AlecTPR wrote:


I've had a new pond that I've put in about 2 weeks now and it's about
time to put some fishes in it.

It's a 1000 litre item, 2 1/2 foot deep with a decent enough pump and
filter (and uv bit).

I'm probably going to just put goldfish in it, something hardy, but
I've had various suggestions.

Goldfish are pretty hardy depending on where you are in the UK. In
North Yorkshire we don't get more than a thin layer of ice and that
won't be a problem providing you have some way to keep the surface open
so that they can breathe. You waterfall will do that very nicely
providing we don't get a really hard frost, it wouldn't freeze with the
recent winters we have had here.

Rosy Reds are a licenced fish in the UK and the seller must have a
licence so you may find it difficult to get them. Koi grow as large as
2-3 feet so they are out.

Should I go out and buy a job lot of 10 - 12 all in one go.

or buy 5 - 6 wait a couple of weeks then add another 6.

You would be best to put just two at a time in and monitor the ammonia
with a test kit. It will rise and then fall again as the bacteria get
growing and then you can add another two and watch the cycle again.

There is a stocking calculator at
http://www.practicalfishkeeping.co.u...pages/home.php and you can
read about ammonia and nitrates there if you are new to them.

I like the pond but the filter and hose stands out a bit at the moment
:-)
I'd shorten the outlet hose so that it looks a bit less intrusive, it
also slows down the pump flow unbelievably and the longer it is the
worse. We replaced out flexible hose with solid waste pipe and got 40%
more flow.


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