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Sorry for all the posts, I have a rare few days off work so I have to get all my tank planning done while I can.

So I ordered a Finnex planted + 24/7 crv. It has the 660 reds. From my understanding it's a high amount of light. My current light is 2 zoodmed ultra sun 6500k 10 watt bulbs. They are mini compacts so the tank doesn't get equal lighting even though there are 2. I leave my current light on anywhere from 13 to sometimes up to 15 hours a day. It's always over 12 hours though. I don't have algae now.

You get algae when there's not enough plants to eat up the excess nutrients right? Well my tank is jam packed with plants now so I ordered 3 new bunches of plants to try to keep it heavily planted cause I figured with new dirt there's going to be a ton of nutrients. There will also be 2 filters running on it. 20g long.

Do you think I'd be able to just switch right over to the Finnex in the standard 24/7 mode and not get a massive algae outbreak or plants melting, since they are already used to being lit for so long? but by comparison being lit by a much dimmer light. It's looking like I'm going to have an extremely busy November with work so I'd heavily prefer to just be able to set it and forget about it rather than having to adjust it everyday to try to get the right amount of light. And the main reason I wanted this light was for the 24/7 mode and sunrise/sunset lol


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I can guarantee that if you keep your lighting schedule of between 13 and 15 hours a day with this light or really any light you will have an algae bloom with in a few days. Your plants need no more than 6 hours a day of light Some here have them on for 8 hours but that is the LED lights that come with a setup. They are low light and unless your plants require medium to high light your Finnex is a little too strong. If you can add a timer to this light and cut back the light to 6-8 hours You might have a good chance with regular water changes and scrubbing the glass all around each day with a very small growth. The other way to help the algae bloom is add a few snails to the tank after you start to get algae.
 

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There are risers for that Finnex model. These raise the light above the tank. If you find you are having algae issues I would suggest those. You can find them at https://www.hanaquatics.com/finnex-24-7-risers/. They can be used on rimmed or rimless tanks and helping with algae issues is specifically mentioned in the description.

I would set the timer for eight hours and if you see algae, reduce by 30 minutes until you find the right balance.
 

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I can guarantee that if you keep your lighting schedule of between 13 and 15 hours a day with this light or really any light you will have an algae bloom with in a few days. Your plants need no more than 6 hours a day of light Some here have them on for 8 hours but that is the LED lights that come with a setup. They are low light and unless your plants require medium to high light your Finnex is a little too strong. If you can add a timer to this light and cut back the light to 6-8 hours You might have a good chance with regular water changes and scrubbing the glass all around each day with a very small growth. The other way to help the algae bloom is add a few snails to the tank after you start to get algae.


I've tried many different bulbs (can't remember the watts/brands for all of them but they all ranged between 6500k and 10000k) and always kept the light on that long since I set up the tank in ... 2014? And never had an algae problem except that time I tried to not have a planted tank lol. That being said yes a Finnex led is still much stronger and if I left it on 15 hours that would probably be really bad. That's why I was wondering about the 24/7 mode. It only gives max light I think between 11am-3pm and then the morning and evening hours are ramping up/down. The Finnex 24/7 light has a timer built in. I think I never get algae because of the heavy plant load and I do have a nerite and just recently bladder and ramshorn snails were introduced through new plants. Oh and MTS for the dirt. Maybe I do get algae and they just eat it all before I see it? I feel I have reasonable populations though.


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There are risers for that Finnex model. These raise the light above the tank. If you find you are having algae issues I would suggest those. You can find them at https://www.hanaquatics.com/finnex-24-7-risers/. They can be used on rimmed or rimless tanks and helping with algae issues is specifically mentioned in the description.



I would set the timer for eight hours and if you see algae, reduce by 30 minutes until you find the right balance.


Thank you! I might have to invest in those! Set it on 8 hours on what though? Max?


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Thank you! I might have to invest in those! Set it on 8 hours on what though? Max?


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I have no idea. You can always ask Finnex. If you bought via AquaVibrant, they are very good at answering questions. That's where I got my Finnex Stingrays.

I gave them a list of my plants and tank size when I was trying to decide which fixture to buy and they were most helpful.
 

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I have no idea. You can always ask Finnex. If you bought via AquaVibrant, they are very good at answering questions. That's where I got my Finnex Stingrays.



I gave them a list of my plants and tank size when I was trying to decide which fixture to buy and they were most helpful.


Thank you I will do that!


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