Newish 75 Gallon Planted Co2 Tank Lighting Advice

Kevinb

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Dec 8, 2019
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Hi, I’m new to the forum; this is my 2nd post. I have been researching a lot here in the last month or so, learning a lot but still timid in cranking up on ferts, light, and co2. I’m trying my best to slowly make adjustments. What I really need most right now is advice on starting points for Strength and length of lighting. In order for that I can give a little background.

75 gallon cycled and stable with regards to ammonia, nitrites, and nitrate.
Moderately stocked with fish.
Moderately planted; newly planted so somewhat juvenile (small) plants.

background; I have Brazilian pennywort and water sprite in the back and a small Anubia in the back corner.

Mid ground is crypts x3, rotala Wallichi x2, moneywort x1, ludwigia repens x2, araguaia x2, alternanthera x 1

Foreground: Micro sword x1 and Pygmy chain x1

2 moss balls floating around.
Lighting; I know this is a weak point but I wanted to start with these until I learn more, then maybe upgrade to t5’s if I get more serious. But for now I have the new fluval planted set at 80% for all color levels for 7 hours. Finnex 24/7 planted light could be used for additional light, but it is off for now.

Co2: I am trying to target a 1 point drop in co2 for my daytime photoperiod, still honing in on this. This is mainly due to an unbearable wait time on my “ideal” brand needle valve. I am using a cheap homemade valve that is not easily titrateable. I am getting in the neighborhood of a 0.7 drop in ph for now.

Ferts: again just starting out and choose to try the pps-pro dosing. Daily dosing of the recommended levels of macronutrients. For micros, I am using seachem’s liquid, one cap full, 2x/week.

I will gladly take any advice on any of the above, but most interested in what to start my light levels at; how intense and for how long? What should I be working up to for strength of light and hours per day. And how fast to increase daytime light.

As soon as I figure out how to post a pic I will.

Thanks
Kevin
 
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Phishless

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PPS ferts are on the weak side, should cause no issues.
CO2 for a 1.0 drop should cause no issues either.

Your lighting I am not familiar with.
Photo-period length for me has been 6.5 hours daily for years without issue.
Without PAR data I cannot speak to the lighting intensity!
 
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Kevinb

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Dec 8, 2019
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“Reported” par data at at 18” is...
Fluval 71
Finnex 60

I guess this would be at 100% settings

so my ferts are weak now because I am feeling that my “max” par levels are on the weaker side.
 

Phishless

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For micros, I am using seachem’s liquid, one cap full, 2x/week.

Which Seachem product?

Guess you would need both lights for best coverage.
I use about 115 PAR @ substrate for 6.5 hours and have never changed even setup my others tanks alike.
I've always started a tank @ this PAR and duration.

So PAR for 18", 75 gallon is a bit taller tank.
 

Kevinb

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Dec 8, 2019
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Thanks, that helps quite a bit. I’m gonna use both lights and ramp them up in power over the next week to 6-7 hours per day. Not sure if my plant load needs that much yet, hoping to stave off any algae outbreaks.

Seachem flourish is all I have for micros at the moment. I’ll research more on this and hopefully be able to mix my own in the near future.

thank you. You’ve been a big help.
 

Phishless

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So Flourish Comprehensive for micros?

You may want to add Flourish Trace to you lineup if you stick with Seachem for micros.