Full Set of CRYSTAL implants Is working with passsive tanks or only active ones ?
Only active, as the description clearly says:
Secondary Effect: 1% bonus to shield boost amount
Passive tank is shield recharge, which is a different thing.
For passive shield regeneration you can use 2 implants which go into slot 7 and 9 (no not a pun).
Zainou ‘Gnome’ Shield Operation 90x (where x is a value between 1 and 6)
Zainou ‘Gnome’ Shield Management 70x (where x is a value between 1 and 6)
You can get the 1, 3 and 5% implants at most NPC station LP stores in highsec empire space and the 2, 4 and 6% implants come from the CONCORD LP store, which require you to run incursions.
The former implant decreases the time it takes you shield to regenerate at around 23-30-ish % by a factor of 1-6% and the latter implant increases your overall shield hp in raw hit-points by a factor of 1-6%.
The way how shield regeneration works is that higher raw hit-points will increase the amount per time shield hp regenerate at the same amount of time.
Say you have 10.000 raw hp shield hit-points and a theoretical ship regenerates from zero hit-points to full hit-points in 100 seconds.
This would suggest that your shields always regenerate the same amount of hit-points but the reality is that the regeneration begins slowly and at around 18% is becomes really fast until around 33% hit-points.
If you increase your hit-points and keep your regeneration time, the overall hit-point regeneration increases too.
So the former implants increases the hit-points and the latter implants decreases the time of the full regeneration, so both decrease the time it takes for your shields to regenerate.