Algae on glass, not on plants?
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Old 05-16-2013, 01:21 AM   #1
dstevenson2k
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Algae on glass, not on plants?


So I have a 12 gallon Cadlights bowfront aquarium. Here's all the basic info before I get into my problem.

Lighting: 2 x 24w Zoomed T5HO with Giesemann bulbs 15in above substrate, 8hrs daily

CO2: Pressurized through needlewheel pump on closed loop, BPS too high to count

Fertilizing: EI for 10 gallon ( 1/4tsp KNO3, 1/32tsp KH2PO4, 1/32tsp CSM+B, 1/32tsp 10% DTPA iron chelate all 3x week, 50% WC, 3/4tsp Equilibrium at water change)

Flow: Mag 3 (350gph) on closed loop, running through reactor and about 4ft of tubing
Koralia Nano (240gph)

It took me a while to get into a balance with everything where I finally got good plant growth and no stunting or deficiency issues. However, I'm still seeing several different kinds of algae on the glass, but no so much the plants (thank god ).

Right now I see soft green dust algae, harder green spot algae, soft brown algae I'm assuming are diatoms, and very small amounts of BBA.

My question is, why if I'm seeing such good healthy plant growth am I still seeing these four types of algae growing on the glass? It's not really a serious issue, but it does need to be wiped/scrubbed off at least twice a week to keep the glass looking decent.

Is there something that I'm doing wrong here or is this just part normal tank maintenance? Looking at all the pristine tanks on the forum, my looks dirty in comparison lol.

Any help or advice would be appreciated.

Thanks,
Dan
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Old 05-16-2013, 05:15 AM   #2
Wannaberooted
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I'd say raise your light up a bit.
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Old 05-16-2013, 05:39 AM   #3
dstevenson2k
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That's what I thought as well, but I've read several older threads that say these lights don't have the best reflectors/ballasts and PAR is only about 50 umols at those heights. If I raise them any more some of my "high light" plants noticably suffer.
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Old 05-16-2013, 06:59 AM   #4
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I have the same light I think, It looks like a pretty good reflector to me. it's polished aluminum with 5 faceted sides. I only use one bulb 16 inches from the substrate with two layers of window screen to get low light on a 20 gallon high. According to Hoppy on this sticky, http://www.plantedtank.net/forums/sh...d.php?t=184368, I'd say you were closer to 80. I hope someone else can chime in.

Oh yeah, have you raised the light before and noticed plant suffering, or did you mean they may suffer?
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Old 05-16-2013, 02:04 PM   #5
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If the plants are growing well algae won't grow well on them. Also there could be some on the plants and you cannot see it. Perhaps the plant mass isn't quite enough to depress growth on the tank or possibly there is just the right amount of light hitting the glass to encourage algae. I see a water change line on my tank as algae doesn't like exposure to air, you could try monster water changes a few times to see if your annoying glass algae lessens.

It is normal really. Part of tank clean up is wiping down the glass inside and out. I am sure the tanks you admire were wiped down before photographs were taken. Read through Francis Xavier's threads on starting and maintaining a tank for ideas on how to improve your gardening skills. http://www.plantedtank.net/forums/sh...d.php?t=168992
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