Phosphate Problem

[Gandolfe]

if you use phosbuster it will save you $$$ because you'll use less GFO which is a hell of a lot more expensive then phosbuster. You'll have to go through over a liter of HO GFO to get even a slight reduction in phosphates if they are high

 

[bertoni]

I'm not sure why you'd want to run the carbon phase first, since it would plug up more rapidly that way if the water has much sediment.

 

[viktor72]

I'm not sure why you'd want to run the carbon phase first, since it would plug up more rapidly that way if the water has much sediment.

Which one is better, to plug up pre filters or to plug up RO membrane?
Anyway,carbon filter could not be pluged up,sediment could but it is designed for that,to protect and extend the life of the membrane.

 

[igadget56]

Which one is better, to plug up pre filters or to plug up RO membrane?
Anyway,carbon filter could not be pluged up,sediment could but it is designed for that,to protect and extend the life of the membrane.

How would that plug up a RO membrane. It's still going through the same 2 filters, just in a different order. Am I missing something?

 

[viktor72]

read the direction that come with the r/o, it says sediment filter first and carbon filter just before membrane

I don't think its right.Who can guarantie that my next carbon cartridge will not leach dust.I have installed sediment filter after the carbon filter,and sediment filter has already black particles/dust from the carbon filter on it.Those particles could get inside the membrane.

 

[igadget56]

I think I'll stick to what the manufacturer suggests.

 

[bertoni]

Why do you think that carbon dust would be particularly likely to plug the RO membrane?

 

[viktor72]

I think all particles can clog the membrane for me it doesn't matter if they are coming from plumbing or from carbon filter,that is why we are using even 1 micron sediment filters.
Once an aquarist gave me advice to put carbon in front of sediment to see what is coming out of it,especialy that I am filling myself the carbon cartridge because the bought ones use chemichaly activated carbon and they can leach phosphates and maybe something else.After that I never used sediment in front of carbon filter.

 

[bertoni]

So how do you know that the carbon filter is putting out more particles than the other filters?

 

[igadget56]

I got the lanthanum chloride today. I dosed a 50gl container of NSW. Now I am getting .06, so it's working. I'm running a 100gph circulatoin pump into a fetl sock. Will that catch the precip. How long should I let it run. Can I dose in the sump and run a filter sock or should I do a couple of large water changes with treated NSW.

 

[bertoni]

For the time being, I'd just dose into the 50g container. I'd let the water circulate for a while to see whether the filter sock catches anything. What is the micron rating?

If the filter sock doesn't catch anything, I'd turn off the pump for a bit to see whether any precipitate settles.

 

[igadget56]

Ok we will try that. I don't know what the micron rating is. Can't remember where I got it from.

 

[viktor72]

So how do you know that the carbon filter is putting out more particles than the other filters?

What other filters,I only use carbon and sediment in prefiltration?I said in previous post,the white sediment filter got black dust on it especialy when I change carbon filter with a new one.

 

[igadget56]

I ran the circulation pump for 8 hours, can't see any precip because the sock is white. I turned the pump off. The water is crystal clear.I will check to see if anything settles when I get home.

 

[viktor72]

I ran the circulation pump for 8 hours, can't see any precip because the sock is white. I turned the pump off. The water is crystal clear.I will check to see if anything settles when I get home.

You can also check the water after lanthanum treatment.

 

[igadget56]

For ???

 

[viktor72]

For PO4,to see if there is any deference.

 

[igadget56]

I did I got .06

 

[bertoni]

I'd probably try dosing a fair amount more of the lanthanum chloride. If the phosphate test result doesn't drop, I suspect the measurement is in error.