The simple modifiaction that Navarre mentioned for your Hydor is as follows:
- Pinch the clip at the top of the dome with a pair of small pliers to remove the dome itself
- Remove the 6 bladed plastic component and cogs
- Snip off 3 of the 6 blades to form a regular pattern, also make sure the cuts are as neat as possible
- Reassemble the cogs, blades and dome cover
Job done! By doing this is was able to attach a Hydor to a 1750lph powerhead without it shooting off - the overall effect is that the dome spins slower but with more output
