Works better than expected ... but

Yet, he really works .....
But it all depends on how much liters has the aquarium.
I have up to 150 liters so my concerns. Since the gravel cleaner but a fairly
high flow rate demands, the pelvis will be more empty than that of all
Sludge is sucked. Furthermore, the bell is quite large and has in small
Pool a more destructive effect.
I go there with my 400 liters Amazon Basin already at the border.
A 100 liter drums should already next to the AQ are to work effectively
want. Fortunately, I can that sucked Mulmwasser to immediately
external pumps. If not, you have a problem or "back".
Better to use the old-fashioned way the good old tube.

Functionally, the gravel cleaner is already perfectly fine. One can in
the gravel immerse order also from the upper layers of the sludge chal-
pick up. Gravel can he casually lying or spits it out again. Fishes
Find the latest on the upper sieve, the end of the trip.

The intake process is simple. You have the bell a few times in the water
on and push off and drain starts.
(In order not to scare my fish, I suck the water rather by mouth to.)
This can still be controlled by an outlet valve. But the more you this
closes, one has logically less suction power.

My personal conclusion:
+ Very suitable for large pools without much decoration and vegetation.
Reach + angle format of gravel cleaner to also in the corners

- Excessive sediment bell and therefore required high water flow
- Hose too stiff

So a stalemate.

I always use the gravel cleaner now in a "big" water change
and otherwise applies, back to the roots: My 12 mm hose and time for hobbies!

In spite of everything, 5 stars for the gravel cleaner.

Thanks to Amazon Leipzig for the super fast delivery.
(Within 24 hours.)

Regards ... Thomas