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Old 04-02-2005, 03:57 PM   #1
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Brown discoloration in sand

What's causing it?
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Old 04-02-2005, 05:06 PM   #2
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I think it's Diatoms. Have you checked your Phosphate level? What kind of water do you use, tap or RO/DI? What is your feeding schedule? Type of lighting? Any info would be very helpful.

BTW Welcome to AA! Good to see a fellow Texan on the board!
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Old 04-02-2005, 09:56 PM   #3
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Thanks for the welcome :P

I only check nitrates nitrites ammonia and ph

I'll go look for a phosphate tester tomorrow thanks
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Old 04-02-2005, 10:03 PM   #4
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New tank? If so, diatoms are part of the process. Keep water paramters stable and they'll more than likely go away on their own. I had two blooms in the beginning, but now my crabs and snails polish off any brown specks that appear.
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30 gal standard 55 lbs LR, 60 lb live sand, 10 gal sump/refugium. Urchin skimmer, mag7 pump, 3 x 96W PC combination 10,000K/actinic bulb, 2 blue LED moonlights
SG 1.024, temp 79.5, pH 8.4

Livestock I added:

1 skunk cleaner. 12 hermits: red, scarlet, blue. 15 or so assorted snails. Discosomas, Ricordia, Rhodactis mushroom corals, chaetomorpha (sump), 1 feather duster, Montipora digitata, Montipora capricornis, Montipora hispids. assorted zoos, Xenia, Kenya tree coral, green Sinularia, green star polyps, branching hammer coral, bubble coral, Devil's hand leather. Yellow chromis, purple firefish.

Hitchhikers: the usual suspects :crabs, bristles, urchin, mantis shrimp (now in exile in mantis tank)

List of possible/likely newcomers:

Feather duster. PJ cardinal, Bangghai cardinal, Firefish goby, Clownfish, Neon goby, Yellow watchman goby, Orchid dottyback. Various corals.
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Old 04-03-2005, 05:10 AM   #5
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Diatoms are caused by silicates unlike other nuisance algaes. As stated abaove they are normal in new tanks and will burn off on there own. If you are anxious you can get a cleanup crew if cycling is complete to help.
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28gal bowfront
40lbs livesand(bag from LFS), 30lbs live rock(LR.com)
2 O. Clowns
1 peppermint shrimp, 5 red leg hermit crabs,
4 mexican turbo snails, 15 nassarius snails
ricordea mushroom, candy cane coral,
super color polyps, hairy mushrooms
bubble coral, hawiian feather duster
coralife lunar 2x65, HOT magnum canister
10 Gal refugium(chaeto) & seaclone skimmer
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Old 04-07-2005, 06:34 AM   #6
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i have the same thing and i just set up my tank in february... should i worry about scrubbing it off my live rocks or just get it off my equipment and get a better more snails and crabs? also whats the difference between diatoms and cyano or are they one in the same? and one more question is there any filter media that will help with this that i can buy?
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Old 04-07-2005, 08:35 AM   #7
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What is Brown or Golden Algae?
Referred to as a microalgae, brown or golden algae is actually not an algae at all, but diatoms. What you are actually seeing in your tank are diatom skeletons, all linked together. It can appear as a simple dusting on the tank walls and substrate surfaces, or it can turn into a massive growth that covers just about everything in the tank. This type of algae outbreak typically occurs when a tank is just completing or has finished the nitrogen cycling process, new live rock is introduced, as the curing process can add nutrients when some organisms on the rock dies off, or tank maintenance has been neglected. It is a normal occurrence, as diatoms are one of the first to appear in the chain when the tank conditions are conducive for algae growth, and is usually a precursor to other forms of desirable and undesirable nuisance type green macroalgae. http://saltaquarium.about.com/cs/alg...a/aa091100.htm
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32 gallon hex, 34 lbs lr, Prizm protein skimmer, fluval 104, 1 maxi jet 750, 1 maxi jet 1200 ph, current 40w 50/50 pc, 1 NO powerglo 19watt, 1 daylight NO 65w (equiv), two damsels, 1 green brittlestar, 1 peppermint shrimp, turbo snails, red legged hermit crabs, kenyan tree coral, leather coral, pumping xenia, mushroom coral, green star polyps, orange button polyps
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