Anyone experienced/w changing a tank/w high light to low light ? - The Planted Tank Forum
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post #1 of 4 (permalink) Old 08-16-2014, 04:08 PM Thread Starter
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Anyone experienced/w changing a tank/w high light to low light ?

Speculation welcomed but hoping for someone who had a high light/Excel tank and dropped it to med or low light.
I was once told that if you remove the Excel it crashes.
But I want to lower the light also.
I have a 10g/w 2x T5 bulbs= 95-105 PAR from Hoppy's chart.
So I'm either going/w one or two T8 bulbs on this. That part I am deciding on right now including info from this thread.
I also have a 10g/w 2x T8 bulbs but no Excel and it gets more algae than this one on the glass. But the T5 tank has Cladophora and I can't get rid of it so I'm willing to throw in the towel on the T5 bulbs.
NO CO2...please don't waste time trying to talk me into it.
I will not put myself through the nonsense of DIY and can't afford injected nor do I want fast growing plants.
Minimal maintenence is the goal. I have been looking in the low tech part of the forum and those plants are more than good enough for me.
So if you have changed a tank from high to low light will you help me with some info on what to expect ?

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post #2 of 4 (permalink) Old 08-16-2014, 07:11 PM
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I've done it numerous times on several tanks. Everytime I "start" a tank or do a big rescape I dose excel and large amounts of DIY C02 with high light. Once the tank reaches a full grown in state I stop the C02, lower the light, only dose ferts twice a month, and gradually cut down the Excel until I'm at 0 or the occasional spot dosing.
I do a big water change to eliminate any leftover ferts in the water column and a good gravel vac.

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post #3 of 4 (permalink) Old 08-16-2014, 07:19 PM
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It would help to know what plants you have. I have high light fixtures but only run them at half capacity. My reds aren't stunning reds, but the tops get decent color. I don't run CO2 either and use little to no ferts. Some of your higher light requirement plants will stop thriving. Other than that, I doubt there will be a ton of difference. I didn't notice anything other than a shift in the pattern of growth between species when I turned mine down.
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post #4 of 4 (permalink) Old 08-17-2014, 01:24 AM
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I stopped diy co2and excel with no problems. Only have a few stem plants left but I have fallen in love with crypts and anubias. You can check out my thread and see when I stopped co2 and see I had no issues. I didn't change lights but found I definately needed a full cover of floaters to prevent algae. I tried messing with light height, duration, one light on one light off, siesta period, and a 3 hour high light(both lights on) with the rest of the time being only one light. Full cover of floater, duckweed and water lettuce was the only cure I found.

If in doubt, add more plants!

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Last edited by jeepguy; 08-17-2014 at 03:04 AM. Reason: More
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