| Akai-San,
A Nexus filter has a small vortex with an Answer mounted in it in the center. The water than passes to the outside ring with fluidized kaldness K1. Water then leaves the nexus and can go into a UV, circulation pump etc. Watch out when pricing the Nexus that you select one with an Answer included as the have a starter model with simply a big blue block of foam in the place of they Answer. I wouldn't recomend ever using one of those. The foam blocks are nothing more than a hard to clean crap-trap.
Let's see... Slotted pipe? Do you mean the stuff that Maurice has in his filter. Well you wouldn't want to cut across the length wise slots as it would ruin the pipe, I imagine that Maurice just cuts the pipe to the proper length and THEN makes the slots in them... Is thiswhat you meant? If not be a bit more specific and I will try again to answer.
B.Scott
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Semper in excreta, sumus solum profundum variat
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