Let's think about what's happening here. The adapter essentially reduces the focal length by about 60%, giving a wider field of view. It's an oversimplification, but let's stick with it for brevity.

Say you have a prime lens with a fixed focal length of 50mm. With the adapter in place, it now has the field of view equivalent to a 20mm lens.

With your lens, that 18mm lens has a field of view of around an 8mm. Definitely fisheye territory.

However, you also have to factor in the crop sensor. This increases the effective focal length by about 50%. Your 8mm? That's now 12mm. Wide angle, certainly, but perhaps not the extreme fisheye distortion you expect.

As you zoom in, the effect will decrease. There's literally no point using these adaptors at anything other than the first few millimetres of the lens since you gain nothing you can't do with your lens normally, while sacrificing image quality.

With the 35mm lens, you will land up with the equivalent of around 21mm focal length. So to directly answer your question: No, it is not going to give you any fisheye distortion on that lens.

I have presumed the one you bought is the 0.43x converter, which is the first one a cursory Google search turns up. To work out the effective focal length, you take the lens focal length, multiply it by whatever magnification it is, and then multiply it by 1.5 to take the crop sensor into account. Again, oversimplifying it a bit, but essentially the lower the number you get, the wider the field of view becomes - you will need to be sub-10mm to get close to the fisheye effect you want.