I have just one minute to the Alginator long test to notice that I get cramps in his hand because he is so small (even though I have little woman hands). For my taste, you have to schrubbeln until the algae away. I had only a very fine dirt on the disc - the pressure but simply not enough. Since I am with the toothbrush go faster and may "regulate" the print itself. In the rounding of the Cube he comes all good though and wanders also great around corners, so you do not have to take into the pool. But then I read by many that they have quickly drawn into Perspex scratches, the risk I have not received! Here again: with an alternative such as filter wool / toothbrush etc. I zerkratze me not accidentally the disc. Would he now cost five euros or so, I would keep it well - but not for almost 17 euro ...
In summary: - At low pressure, purifies not good / slow - Too small to be comfortable out by hand - Scratch risk on the discs - Price !!!
+ Come super corner, rounded edges as well as square! One must not take into the pool + Would not interfere visually due to the small size, you let him in the pelvis
