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Old 02-05-2009, 11:53 AM   #1
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MH light changes

No phosphate issues. No low flow issues. Nitrates at zero, but I keep getting this brown film with tiny bubbles on my sand. PWC and suck out that very top layer in the bad spots and itsback within a week or two.

Can old lights do this too? I'm using the Coralife Pro, 3x150 HQ and 4x96 actinic03 bulbs.

I've replaced the HQ once already maybe a year or so ago. Keep thim on only 8-9 hrs daily. Never replaced the actinic.

How often should the HQs be replaced? Could the actinic be giving me problems also if not replaced?

What else should I be looking out for?
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Old 02-05-2009, 08:03 PM   #2
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OK. Phosphates measured at .5 or less.
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Old 02-05-2009, 08:34 PM   #3
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How often are you feeding your tank? Brown with bubbles screams dinoflagelettes to me but could easily be cyano. Either of the two are a result of high nutrients in your system. All the basic things apply, increased water changes, less feeding reduced photo period, cleaning of all equipment with sponges.

Cleaning your skimmer out may help as well. A serious cleaning, take it off line and clean it out really well. I know you have lots of flow in the tank so that shouldn't be a problem. I try and replace my MH bulbs every 8 months. Actinics not as often but they get replaced a minimum of once per year.
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Old 02-05-2009, 08:44 PM   #4
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I feed every other day for the most part. Maybe that I leave my skimmer off for a month at a time or more???

I just turned it on. Never needed it before I thought. Used to go for months without it. I clean the sponges on the pumps and the fuge baffle filter about once every 3 weeks.

I guess I'll order 3 new MHs and 4 96w actinics. Ouch!! The actinics are original, approaching 3 years or so now.
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Old 02-05-2009, 09:15 PM   #5
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Pics of the stuff...
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Old 02-06-2009, 06:30 PM   #6
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Anybody?
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Old 02-06-2009, 06:40 PM   #7
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.5 phosphate is pretty high...actually any reading is high. Are you running GFO?
Looks like some dinoflagellates in there too.
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Maybe that I leave my skimmer off for a month at a time or more???
That can definitely be a problem. What kind of skimmer are you using?
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Old 02-06-2009, 09:17 PM   #8
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Dunno what GFO is, but I doubt it.

Using the Aqua C EV 180 skimmer.

Wow, .5 being the lowest on the reading scale.... I had no idea that was bad. Just ran some RO/DI for a PWC soon. Gonna go test that.

I'll admit, Been doing a lot of flake foods for the last month. Also been doing the top off reservoir with tap water (don't ask me what that is, but I might as well test that too).
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Old 02-06-2009, 09:26 PM   #9
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GFO is granular Ferric Oxide - aka phosban basically.
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Old 02-06-2009, 09:31 PM   #10
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Will be getting some Rowa Phos tomorrow. I always knew ANY phospahate was not good, just forgot .5 can do damage in a reef.

Might explain recent changes such as; xenia not as prolific these days, lost a green hammer, brown hammer slowly receding, hair algae in a few places, and lost my year old coco worm -all in the last 5 months.
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