One of the first
things I noticed when I hooked up my Prizm skimmer was that
I couldn't get much flow out of it without lots of micro bubbles.
Since my tank is 13"x13", even the smallest amount
of bubbles is a lot, and not good for seahorses. With the
low flow, I also noticed that the surface of the water was
getting particle build up, and since the skimmer was drawing
water from about 8" down, there was also no surface skimming.
These observations are compounded by the fact that this is
a seahorse tank, and by design, will not have a lot of flow.
I thought I could make a skimming adapter for the Prizm, and
below is what I ended up doing.
- 1 ea. 3.5" floppy disk hard plastic case (the one that
you get when you buy 10 disks)
- 2 ea. small plastic tie wraps (or one larger one)
- Super glue Gel
- 1 ea. 3.5"x1/2" plastic strip (to be used to seal
- Table saw (preferred) or a circular saw or hobby saw
- Hand held hobby saw (preferred) or a hack saw
- 1 ea. 1" piece of duct or masking tape
First, modify the plastic box to make slots where the water
can pass through. Using a table saw, adjust the blade so it
extends 1/2". Next, disassemble the box. Using the table
saw, cut grooves from front to back in the top of the box.
Be careful as the plastic is brittle and can easily shatter
and ruin the box. You could try first taping the box with
duct tape to add some strength. Once all the slots are cut,
take a hobby hand saw and gently cut off the very top of the
Here's the assembled box. In my version I only cut slots
in the front and on one side. If I had it to do over, I would
cut the slots as described above, on the front and back, and
not bother with the sides.
The next step is to make sure your tank is topped off at your
"full" level. Take a piece of tape and place it
on the Prizm's intake tube to mark the water level position.
Once that's done, remove the skimmer from the tank.
The only modification to the skimmer is that we have to shorten
the intake siphon. Using the tape you put on the siphon tube
as a guide, line up the skimmer box you just made so that
the top is slightly higher than the tape. Now mark the siphon
tube where you will cut it. Give yourself about 1/2"
of space between the newly cut tube and the bottom of the
If you want, and I will make this modification when I clean
it the next time, cut the tube short enough so that you can
get the strainer back on (you will have to remove the little
tabs in the strainer for it to fit). Without the strainer,
much more water is drawn in. So to allow for your valve setting
to remain the same, you should put the siphon on...not to
mention the safety of anything that might climb in. Cut the
siphon tube carefully with a hobby hand saw. If you ever want
to revert back to the original configuration, you can connect
the two siphon pieces back together with a piece of plastic
Once the siphon is cut, mount the siphon box as it would
be if it was attached, lining it up with the tape, and butting
it against the Prizm's output. Now take a pencil or something
and mark along each side of the siphon tune on the back of
the skimmer box. This is to allow you to know where to drill
two holes, which you pass the tie wraps through, to secure
the box to the siphon.
In this picture, you can see the box already assembled to
the Prizm, and aligned with the tape. The box was marked and
the holes for the tie wraps drilled, The tie wraps were then
passed through the holes, and looped around the siphon and
In the picture above, you also notice that I glued a thin
piece of plastic over the opening in the box. Your may or
may not need this, or you can seal it with aquarium silicone
or the like.
Lastly, secure the box to the siphon a and put the Prizm
back in the tank ... you're all finished.
The finish product below:
Below is a view looking through the tank. The nylon stocking
on the output cuts down on the bubbles.