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Old 11-03-2009, 12:24 AM   #1
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Need help with my water Balance

Hi,

I'm new to this forum and to keeping a reef tank
I'm doing it now for 3 month and it's not going as it should be
2 days ago I lost my Blue carpet that I bought healthy as far as I know and read
I also lost 2 clown wish, 2 damsels
The rest is doing well.

My PH is way too low 7.6
the last view days I'm trying to play with the calcium and Kh

When I started, the PH was 7.8, Calcium was 240 and KH was 12 dkh.
as you see the Calcium is way to low and the PH is also a bit low.
I don't have a Calcium reactor, but I bought Kent Calcium supply and seawater KH Balance

In the last 3 days I worked the Calcium up to 350, but my KH went up too
and is 14 dkh and my PH dropped to 7.6

Here are all the test result that I can do

PH - 7.6
salinity - 1.023
Temperature - around 25C.
KH - 14 dkh
Calcium - 350
No3 - Around 25
Ammonia -Between 0.02/0.05 ppm(save)
I also Have a Phosphate tester but don't get any results

It's a 500 Liter reef tank
with a skimmer, Cotton filter, 100meter no3 filter tube that drops 1 drop every 3 seconds , and self-made Bio filter with around 10kg white looking round stones with a hole in it. I forgot the name the packing had only Chinese text, can't read Chinese yet!!! and I've a 9w UV lamp

I also dose 2ml vodka daily

Any suggestions?
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Old 11-03-2009, 12:20 PM   #2
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So I am assuming that you already cycled your tank. One of the ways I have found to keep water parameters in check is to do frequent PWC`s. I would try that and see how that does.
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Old 11-03-2009, 08:30 PM   #3
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PWCs I agree, using chemicals to adjust water quality is always a give and take, and rarely does it work out long term. The rock you are using with the holes. It isnt Texas holey rock is it? Test it to ensure it is carbonate based. There are some volcanic rocks which look to be carbonate but when tested are not and tend to leech sulfur into the water, easily causing a low PH.

What is a NO3 Filter tube and what is it dropping just wondering...
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Old 11-03-2009, 08:32 PM   #4
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There are 2 tests I would do on unkown stones. 1st test is using a weak acid (vinegar) if you see or hear it bubbling then it is a carbonate type stone( good). 2nd test is mix 1tbsp (2mL?) of baking soda with distilled or RO/DI water and soak your stones in it. If you see bubbles after a few hours kinda like a stone in a soda then you have a rock that is leeching acids. (bad)
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Old 11-03-2009, 10:15 PM   #5
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Thanks for the replies

I do a 30% water Change every 2 weeks and I use seachem Prime with the new water (About 5ml)

However, I had to move my tank 3 weeks ago, and had to take all the water out. I didn't have enough buckets to keep 500L water so I had a 90% or more water change. This gave me those brown Algie back.

not very happy with that, but It will go away

About the 100meter tube.

it just a thin tube with sulphur in it, If I'm right
the water goes trough the tube very slow and removes all the NO3

I work, If I test the water for NO3, It's around 25
but If I test the water from the Tube, Then it's near 0
but It's very slow.

I'll do the test later with those blocks to see what happens
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Old 11-04-2009, 12:33 AM   #6
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I thought that would be your description of the tube. I would venture to say that the sulphur you are using to strip the NO3 from the tank could be fowling your water and giving you your PH problems... If Nitrates (NO3) is high try using something liek a refugium to get that out. or PWCs work best. JMO
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Old 11-04-2009, 02:00 AM   #7
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First of all, Many thanks for helping a newbie

to Build a
refugium would be a pain in the ***!!!

I totally don't have the space anymore. I already planning to create pipes to an other room for a chiller that I need when it gets summer again

What is a PWC for 500 liter? 30% every 2 weeks as I'm doing right now? or is it to little?

Also I'm using normal tab water with a conditioner (seachem Prime)
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Old 11-04-2009, 12:27 PM   #8
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Test your tap water for NO3 if its present in your water that will account for its pressence in your aquarium I dont know how the water quality in Beijing is but I would say getting your self a nice Reverse Osmosis/DeIonizer unit would be a great investment. It is much easier to maintian water quality when you start with pure water.

CHeck your water supply and let us know the results.
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Old 11-04-2009, 07:53 PM   #9
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"and I've a 9w UV lamp"

I don't think 9w UV bulb is enough for a 500l reef tank. Is that a mistype? Carpet's need a lot of light.
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Old 11-04-2009, 11:20 PM   #10
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No3 from my tab water is undetectable, color was very Yellow, so 0 or near 0

about the UV light, I was told that a 9W UV light is big enough for a 500L reef tank. and also UV light is a + and not really a need for Reef tank

for my normal light, I have an automatic light system with 3 settings
white Light 2x 150 watt, Blue light and LED (Moon light)
9am till noon has Blue light.
Noon till 8PM has White light (total 300 watt)
8pm till midnight has Blue light again
midnight till 8AM LED

should be enough light in my eyes8O
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