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Old 08-20-2013, 11:14 PM   #1
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diatom like brown alga on sand

Tank has been up for around 6 months. Im Daily having a light brown film or algae build on the sand.
Sand was new, rock iv had.
T5 lighting, running carbon and purgin through a reactor
75g internal overflow 20 long sump.
Nitrate 0
Ph 8.4
Phos .2
Nitrite 0
Ammonia 0
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Old 08-20-2013, 11:17 PM   #2
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Could be silicates from the sand maybe
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Old 08-20-2013, 11:19 PM   #3
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For this long? I even soaked the sand for a week prior
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Old 08-20-2013, 11:30 PM   #4
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I had/have something similar. I would stir the sand around and the brown would be back the next day. I got rid of it by adding an orange stripe goby and a Hector's goby, they sift the sand and eat the algae, they do a great job of keeping the top sand clean.
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Old 08-20-2013, 11:32 PM   #5
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How is your flow?
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Old 08-20-2013, 11:38 PM   #6
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Iv had my eye on an orange stripe and pistol combo.
For flow, Mag seven return,
Two ocean stream 500gph powerheads and a pico 180gph directed at the frag rack
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Old 08-20-2013, 11:53 PM   #7
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The goby will definitely keep the sand nice and clean. I had one and he worked constantly until he jumped out. Ceriths will help too.
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Old 08-21-2013, 12:00 AM   #8
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Iv got certh, nassurius, astrea, maragrita and turbo snails. Even a few red footed chonches and an emerald crab in the sump
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Old 08-21-2013, 03:00 PM   #9
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Well I've read diatom blooms will come for no apparent reason and be gone just a fast. But to have it all the time then there must be something else going on to feed the algae...
How often do you change the water and how much? How long are your lights on? How often and how much do you feed? How old are the bulbs? (was the light fixture new when you bought it?) Do have A refugium? If so what's in it? I see you run carbon and purigen in a reactor maybe it needs to be changed? Do you have a skimmer? The list goes on and on...

It's all about what's going into and out of the tank. Go through everything one by one until you see whats out of place.
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Old 08-21-2013, 03:11 PM   #10
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Iv had the fixture for sum.time, a six bulb nova extreme pro. Three bulbs are 9+ months and three are only 3+ months. Lights run about ten hrs
Have three new ati bulbs on the way,
I do ten to fifteen gallons every week.
Yes i run a eshoops 100 in sump skimmer. Just changed the purgin and carbin this week.
I am just running cheato and ljve rock in a breeder basket in the sump at the moment.
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