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From my experience 4 T5 tubes with good reflectors/ballasts was WAY too much. Currently I have 2 T5s hanging 80cm from substrate and its more than enough . I think it all depends on the quality of the light fixture. Some of them have very poor reflectors, cheap ballast so the output is weak even...

Well PAR is impossible to measure, since I dont have the meter and I am guessing no one has it in my country :( But I have oldschool lux meter... With 2x24w: 7000 lux - at surface, center of tank; 5000 lux - at surface, in corner. Also at 8am: 600lux from window on the side glass; didnt have...

Currently my photoperiod is 7h of 2x24w T5HO, from 12:00 to 19:00. Light is raised about 40cm from water surface and aquarium is 60x60x45cm (length, depth, height). CO2 starts at 10:00, goes off at 18:45. The room is quite bright - the windows are facing the south. Aquarium gets few hours of...

Am I mistaking something, or you have always suggested good surface agitation? "point spray bars upward..."

For flow I am using JBL crystalprofi e1500 with flute output on the back wall. CO2 - pressurized, external atomiser. Well, I am thinking I will go with 3 bulbs and ability to light them up separately. I'll start with 1 at first.

Wow, I was thinking not less than 2 bulbs. I guess that was the reason this tank failed in first try :D Anyway, thanks for input. Going to remake my light pendant....

Hello everyone, How many 24w T5HO bulbs would you recommend for 60x60x45cm (24x24x18inches) tank. When each lamp will have its own reflector, pendant is ~15cm (6inches) from tank top. CO2, planted tank Thanks in advance