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Originally Posted by ken_yg
I changed more than 20 litres of water daily, & at least one 25% water change each week, & yet nitrate is usually above 40 ppm. To rid of the remainder 40ppm, think how much water change I must do each day?  |
hmmm... i'm trying to help u analyze your water problem here. saw your gallery. r u referring to your large ST comm with pebbles base tank.
sometimes it depends on feeding, tank mates and setup. mine is ok with just one de-nitrator. some bros here got 2 de-nitrators running and happy with the result.