Phosphate in water supply help needed - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 04-25-2006, 09:37 AM Thread Starter
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Phosphate in water supply help needed

I have discovered that the local water supply is dosed with phosphate to reduce leeching of lead in old pipes into the water.

From what I've been able to ascertain they say it should be about 1-2ppm

When I tested the supply last night I found it nearer to 10ppm

This obviously has a serious impact on algae and my aquarium. I am about to upgrade my lights and am worried that the algae will go through the roof.

What is the best way to remove phosphate from the water ?

I know I could use RO but are there any other ways ? treatments ? filters ?

What is the best Phosphate test ? What do people use ?

please help


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post #2 of 7 (permalink) Old 04-25-2006, 01:57 PM
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i live in warrington near manchester i also got high po4 (phosphate) in tap water and i not really had any poblems with it anpart from it saving me from doseing po4 i dose same kno3 that i got in po4 in water.
algae isn't an big problem in my tanks ,you might have small problem while plants growing but then again my low tech low light tanks not had any problem with high po4 if i remember right some say high po4 don't mean bad algae if im wrong i will be put right

i use hagen po4 test kit




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post #3 of 7 (permalink) Old 04-25-2006, 02:23 PM
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Plants need phosphate to grow, and we dose it for that reason. If your water has it already in it you are lucky. Each time you do a water change you are dosing the phosphate the plants need. Excess phosphate does not cause algae.

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post #4 of 7 (permalink) Old 04-25-2006, 02:58 PM
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I live in Manchester too. My P04 reading in the tap water is about 3ppm. I still dose on top of this. No algae problems. (well at the moment!). If you have an algae problem it's more likely that you a limited by another nutrient. Do you dose macros and micros? What are your other water parameters NO3, Ph, kH, GH etc?
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post #5 of 7 (permalink) Old 04-25-2006, 04:34 PM Thread Starter
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Thanks for the replies
I will have to see what happens when the new lights go on the tank

My water parameters are

KH 4.5
PH 6.8
CO2 - approx 21ppm
Nitrite - 0
Nitrate - 25ppm (may be a bit high)
Phosphates (after last water change) - 4ppm

So are Hagen tests what's recommended in the UK ?
I've been using JBL and they seem OK

Ta
Gary


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post #6 of 7 (permalink) Old 04-27-2006, 03:49 PM
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Quote:
Originally Posted by GazK
Thanks for the replies
I will have to see what happens when the new lights go on the tank

My water parameters are

KH 4.5
PH 6.8
CO2 - approx 21ppm
Nitrite - 0
Nitrate - 25ppm (may be a bit high)
Phosphates (after last water change) - 4ppm

So are Hagen tests what's recommended in the UK ?
I've been using JBL and they seem OK

Ta
Gary

Your nitrates are fine with the phosphate level out of your tap...try to maintain that level. With co2 (you may want to increase that a bit higher), it will aid in the uptake of the nutrients. You are in a special case where your dosing schedule can be modified a bit rather than following the standard EI dosing schedule (also cheaper). Right now I'm lucky that I have both phosphate and nitrate in my tap so no macro dosing except for potassium

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post #7 of 7 (permalink) Old 04-28-2006, 11:51 AM Thread Starter
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Cheers
Feel a bit more confident about the whole thing now
Ta
Gary


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