Carbon prefilter change

[plecocicho]

Hello,
on my carbon filter for osmosis it says it must be changed in 3 to 6 months. Is that meant for the 24h /7 days a week/3-6 months usage? If so it would mean it can last for 90-180 days of 24h/day usage. I only use it once a week for 4-6 hours, so it should last me far longer i presume?

[pcsb23]

Within reason I usually change mine on estimated throughput - most have a typical volume of water they will "filter" I usually aim for around 80-85% of that and then change, not as though they are mega expensive :)

[nc0gnet0]

I just monitor my output for chlorine, when I see a trace I replace. I tend to get more than most use out of my carbons, that I attribute to my relatively low chlorine levels. On the other hand my sediments need changing quite often......

-Rick

[plecocicho]

According to my tap provider, residual chlorine in my tap water varies between 0,05 and 0,3 mg/l. Is this high or low concentration?

[nc0gnet0]

1 mg/l = 1ppm
4mg/l is the maximum allowable

[DISCUS STU]

for my Coralife prefilter it states every 6 months or 3,000 gallons. I assume the gallons trump the period of time but regular monitoring is a good idea also.