This time i decided to try RDSB method to maintain my nitrates level low.

Purpose
- to keep low level of nitrate

Item used
- 1 x empty Red Sea (25kg) bucket
- 20kg fine sand
- 3 tank connector 15mm
- 4 elbow 15mm
- 15mm pipe secukup rasa
- atman 103 pump

Steps
- create 2 hole for return (i only have drill for 15mm ngam ngam) nak pakai 1 bigger return 25mm lagi bagus
- create 1 hole top (buat kat penutup)
- lastly plumb it together
- tadaaaa siap

Other
- i just cycle it about 1 week until ammonia level 0ppm

Problem
- at the beginning, return water direct to last section of sump, but its create a lot of problem since a lot of sand dump into the sump and return back to aquarium.

Solution
- make return to 1st section of the sump.. problem solve! .. make sure put a sponge/sock filter at return to minimize sand entering to sump
- other solution decrease sand volume :D