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Old 01-04-2009, 08:19 PM   #11
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I posted with this same problem about 6 months or so ago in my 24g nano before it cracked. It drove me crazy. Same problem - low PH and brown "stuff" on the sand. Didn't act like cyno (wasn't slimy). I ended up reading something about tanks that are covered all the time (which mine was) and poor oxygen exchange, even with additional powerhead.

Could that be your issue? Is your tank covered? I uncovered my tank, did several good size water changed, and increased the size of my Koralia (and direction). The brown stuff on the sand looked more like diatoms. I even went up to 5 days without feeding. It did finally resolve itself. Also, lighting was an issue. It took me a while to realize that since the tank was in a classroom, I needed to take the fluorescent lights into account. Several years ago, they installed special fluor. bulbs to simulate "daylight" for the kids - sounds like prison huh! So, have you thought about oxygen exchange, lighting and water movement too?

These guys are wonderful. They'll help you think it through. I have learned a lot just by reading, reading, reading all their advice and posts. Your readings will be off if it is cyno or algae because it will consume phosphates and nitrates so don't go just by the numbers.
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Old 01-04-2009, 08:31 PM   #12
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I'd prolly limit the coral feeding to once every 2 weeks for a while also and see if that helps. That's way too much coral food IMO.

I forgot. Didja say there was other water movment in addition to the main return pump? Trying to figure out if there are dead spots too.
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Old 01-04-2009, 08:34 PM   #13
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Fishcrack:

Yeah, my tank is uncovered, I have two additional powerheads and have changed my lightbulbs. Hope we can figure this out, very frustrating!
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Old 01-04-2009, 08:36 PM   #14
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Austinsdad:

When you say I am feeding too much, are you refering to the phytoplankton? Someone else said I shouldn't even use this due to my coral makeup. I am confused now, the local aquarium store said I needed it. Anyone know?
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Old 01-05-2009, 11:55 PM   #15
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Algae pics

Here are some pics of the algae that plagues me!
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Old 01-06-2009, 03:52 AM   #16
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dude, what kind of snails do you have, water has nothing to do with blooms. Ceths are the smallest and best for diatonms from what i've dealt with. If you have growth on your sand that means that you aren't properly maintaining your tank. sift the sand and create a storm effect every week or so, that will get all the crap off of your sand and into your skimmer. Remove and rinse bioballs every month and clean up the stuff that accumilates underneith the biobals. Remember saltwater tanks demad wayyyy more care and caution than freshwater tanks.
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Old 01-11-2009, 07:22 PM   #17
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more algae...

Seems like I can't shake this algae!!! Since my last post, I replaced my RO/DI filters and added ROWAphos phosphate and silicate adsorber. The adsorber is in a mesh bag under the flow of water. I also changed my water on Friday (~10 gal of my 40 gal tank)

Still, I have continued algae growth. Which looks like this...
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Old 01-11-2009, 07:33 PM   #18
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to me... and im no expert but the algae on the sand actually looks like diatoms... the stuff on the glass... im fighting the same battle right now... pulling my hair out

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Old 01-11-2009, 07:35 PM   #19
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How often are you running your lights? The stuff on the glass can be wiped away with a mag float. I might have missed it but how often are you feeding.
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Old 01-11-2009, 07:54 PM   #20
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Feeding

I have recently cut back on feeding, now just :

1x weekly phytoplankton
1x weekly cyclop-eeze
2x weekly pemysis

Despite this long standing problem, I haven't had much trouble with coral, fish, inverts. Until recently, my coral banded shrimp and sand sifting goby have died, both had for 1 yr. Am I feeding too little now? Don't see any changes anywhere.....

I run my lights:
Actinic for 8hrs
'white' light for 6.5 hours
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