Hi, i want  to buy an Hybrid Waterblock for my EVGA GTX 1070 FTW, but i'm afraid about the installation : On my GTX 1070, i have 2 fan, or with the waterblock, there is only one. Is it compatible? 
(for time shipping i want buy a "EVGA GTX 1080/1070 Hybrid Waterblock Cooler (400-HY-5188-B1)" on amazon)
  

This is the one you want.

Yes but i have  and she have 2 fan and i read  and i didn't see the second fan.
Is it compatible ? i'm novice :/

The 400-HY-5288-B1 is compatible with the 1070 FTW. 400-HY-5188-B1 is not compatible with the 1070 FTW.

can you advise me a good waterblock compatible for GTX 1070 pls?

Galoinoc
can you advise me a good waterblock compatible for GTX 1070 pls?

https://www.ekwb.com/shop/ek-fc1080-gtx-ftw-acetal-nickel
 
or 
 
https://www.ekwb.com/shop/ek-fc1080-gtx-ftw-nickel