Oase 1" Frothy Fountain Head Nozzle

I have installed 4 of these in 4 of our ponds in a botanical garden. They work as advertised to clarify water, stop odors, and keep azola under control. The wake from the nozzle also moves floating water plants to the shoreline keeping the center of the pond clear. We have adjustment issues with one of the four. This one has a 60gpm pump and appears to adjust itself to higher heights than we set it within 24 hours of being adjusted. The other three have lower gpm and appear to stay adjusted to the height where we set it. My only issue with the nozzle is that it comes with pictures-only documentation in an attempt to be multi-lingual. Adjustment is not very intuitive and it would be nice to have a text explanation of the adjustment process.

Item was shipped out promptly and was in good condition. I'm using it in a smaller fountain so I didn't want water loss from wind and splash over. It works great as described. It has a fair amount of air mixture so it's sound is different from a normal fountain head and you can hear the additional background noise of it mixing. It's a great fountain head however with very apparent design and build quality.