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Old 09-21-2004, 08:06 PM   #1
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how to get rid of red stuff

My tanbk is about 6 months old and all of a sudden last 2-3 weeks i am getting red stuff growing on the rock and sand . It looks ugly!!! My nitrates are 0 and all other test are ok. I think i have plently of flow 1 maxi 1200 and 1 maxi 900 in a 30 gallon tank. I siphon it out during a water change and in grows right back. What can i do ???

Thanks
Richard
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Old 09-21-2004, 08:35 PM   #2
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I had the same problem in my daughter's tank. I switched the bulb out for ones that had less red spectrum and more blue. Within a couple of days - a noticeable difference.
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Old 09-21-2004, 09:48 PM   #3
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If its cyano it is a sign of excess nutrients in your tank. Your water flow sounds fine. Try frequent small water changes using RO or DI water, change old bulbs and make sure you are not overfeeding.
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Old 09-21-2004, 11:26 PM   #4
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coraline algae?
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Old 09-22-2004, 01:03 AM   #5
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red spots

i have this too, but only since i added the blue light ( i only had white before) am i overdoing it with the reef supplement???
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Old 09-22-2004, 02:08 AM   #6
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Might I make a suggestion or two in the form of a few questions?
Where are you getting your water from? Have you looked at your water under a scope with a Sedgwick-Rafter chamber? I would be curious to see what is colonizing your substratum. I can think of a few obvious culprits like the Cyanobacteria, but I have a couple of other culprits in mind that are a little more rotten. Have you noticed any fish behavior that might suggest a dissolved oxygen crash? This would be particularly noticable in the early morning hours and your DO concentrations would probably be less than 4 mg/L O2. Fish are obviously stressed at 4 mg/L and fish kills in natural systems are common at O2 levels below 1 mg/L. The strange thing about this is that it is easily explained. An algal bloom at the right time can cause DO levels to drop dramatically in natural waters. Algae shift to O2 respiration at night acording to a supposed Circadian rhythm. Once the light of day hits, they revert to photosynthesis.
Just my $0.05...was $0.02...****ed inflation...

EDIT: Are you using NSW as make up water? If so, where are you getting it? Is it oceanic or is it bay/estuarine?
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Old 09-22-2004, 02:15 AM   #7
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Also you may want to check your PO4 level. it is notorious for feeding cyno. Check your source water for the same. A deionizer on your RO unit (if you have one) may be in order.
Also carefully siphon off you rock and substrate. It is not enough to break it up. In fact, this just helps it to spread.
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Old 09-22-2004, 02:39 AM   #8
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Quote:
Originally Posted by quarryshark
Also you may want to check your PO4 level.
Yep...this one will cause an algal bloom in a natural system too.
Hmmm...got pics of the colonies? Microscopy would really help too.
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Old 09-22-2004, 01:18 PM   #9
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It definately sounds like cyanobacteria when you mention siphoning it out and it returns. Quarryshark hit the nail on the head when he mentioned Phosphates. A six month old tank is still relatively young and "most" tank go through this type of problem at one point or another. Well planted refugiums help a great deal by eating up all the excessive dissolved organics before the nuisances get the chance. Also as mentioned above, you water source is a big issue. But from what I have read here the "reef supplements" you are adding is most likey your bingo. Depending on what you have in the tank additional supplements other than water changes is rarely necissary. Especially in a 30 Gallon tank where water changes of high percentaes is relatively easy. How is it stocked? If your fish stock is within normal limits and your calcium load is light (no stoney corals) then I point my finger at the supplement.

HTH,
R-
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Old 09-22-2004, 03:36 PM   #10
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Good luck, I have been fighting cyano for about 3-4 months. I bought a RO/DI, have a fuge set up and it is flourishing, I have 3 maxi 1200's, a mag7 return and I just added a Seio 620. I should have pushing over 2000 gph on my 75 gal. I really hate having 4 PH's in the tank too!

I tested my PO4 last night and came up with 0.

I added a spray bar to my return to help spread the return flow out a bit. Now I have cyano growing on the back of the tank. I have tried phosguard too.

At this point I wonder if it is my skimmer. Don't know what I will do next.
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