Therefore I buy for several years and therefore Refill Refill the beginning purchased and now disused filter cartridges. To this end, I have drilled beneath the filter cartridge rim a hole to remove the old granulate and then to clean the cartridge thoroughly. After drying, the cartridge is filled with pellets and with a silicone plug the drilled hole is tightly closed! Everything works great! The filling is not a problem even for a layman or little experienced hobbyists.
The saving is good 100 EURO at a price of around 11euro per original filters and approximately 12-13 refills !!! And what is even saves on plastic waste to be observed already!
The price-performance ratio, I find simply unbeatable!
So a real !!! Buy recommendation !!!!
