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Old 08-19-2018, 05:06 AM   #1
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Lighting

Have tropical,planted tank,unusual size 99cm L x 42cm W x65cm D. 67.5 gallons. Have 2 t5 tubes 39w each. + 2 t8 tubes 30w each.is this too much light for the tank,lights on 8hours a day.? Mainly low light plants.would I be better off with just the two t5s ,maybe longer light period or switch to led lighting. Any advice gratefully received.
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Old 08-20-2018, 09:36 AM   #2
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65cm (roughly 2') is a lot of water to penetrate. Start with the 2 T5's, add the T'8s if plants are struggling or growing very slow.
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Old 08-20-2018, 09:51 AM   #3
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Many thanks ZxC for your help and advice.
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Old 08-21-2018, 06:12 PM   #4
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Agree. Too much light breeds algae, so less is better.
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Old 08-21-2018, 08:29 PM   #5
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Lighting

That is deep! Java fern might do ok. Or Val or anything that can get to grow up near surface but propagate through runners at substrate.
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Old 08-21-2018, 08:32 PM   #6
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Quote:
Originally Posted by Delapool View Post
That is deep! Java fern might do ok. Or Val or anything that can get to grow up near surface but propagate through runners at substrate.


Yes it is. I was just thinking that it would be better to start low and work up. The OP mentioned low light plants.
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Old 08-22-2018, 12:25 AM   #7
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Yes, worth a try. A guy here with similar deep tank was doing ok low tech but hair algae on tops of plants.
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Old 08-22-2018, 02:31 AM   #8
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Many thanks all for the advice.
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