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Discussion Starter · #1 ·
I am setting up a 75 gallon rimless tank with co2 injection. After using CFL before I wanted to try T5. I contacted Catalina to ask what they would sugget for a fixture I could suspend. They suggested a 8x55w 48" setup. That seems like a ton of light (also expensive). Does anybody have any advice as to how many T5 bulbs I should get- can I get away with 6 or 4?. I imagine one has to take light spread into account, but I would like to be able to grow anything I want.
thanks
KYpros
 

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I have a 4 bulb TEK over my 75g. Running 2 bulbs at a time, overlapping only for 2 hrs. My plants grow like crazy (HC, Blyxa, roatalas), but I have to dose a lot and I have pressurized co2.
8 Bulbs is way too much for that size and a planted tank.
 

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Discussion Starter · #6 ·
great, thank you guys 4 bulbs are a lot cheaper also
thanks

I have a 4 bulb TEK over my 75g. Running 2 bulbs at a time, overlapping only for 2 hrs. My plants grow like crazy (HC, Blyxa, roatalas), but I have to dose a lot and I have pressurized co2.
8 Bulbs is way too much for that size and a planted tank.
 

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The 4x54W fixture ($275 currently) was just on sale for $190. You can probably still get it for that price, just call them.

The 3x54W fixture is only $140 though, and I have it on my 75 gallon. It is nice, I have just started dosing fertilizer and adding CO2. I'm only using 1 or 2 bulbs for now.
 
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