Two T5s enough for my tank?

campaign000 · Jun 17, 2018

Tank is 18" high and T5s 4" above tank. I'm using 15000k 24w + 22000k 24w. Lux reading on the water surface is 22k (440 PAR), cannot get the number under water.
Do you guys think it's ok for my clams?

TheSchwenkster · Jun 17, 2018

Love the setup!

Not a T5 guy but it seems borderline and could go either way. Might help knowing the bulb and fixture brand. I'd bet you get a few responses either way and would need a par measurement to know for sure.

reef lover · Jun 18, 2018

With 440 at the top imo theyll be fine the tank is not that deep.

campaign000 · Jun 19, 2018

TheSchwenkster said:
Love the setup!

Not a T5 guy but it seems borderline and could go either way. Might help knowing the bulb and fixture brand. I'd bet you get a few responses either way and would need a par measurement to know for sure.

KEY lamp with Giesemann bulbs.

campaign000 · Jun 19, 2018

reef lover said:
With 440 at the top imo theyll be fine the tank is not that deep.

Yes clams seem fine and most of them show growth but not as fast as I expect.

TheSchwenkster · Jun 19, 2018

How are the nutrients and elements looking? Maybe something else missing that is holding back growth.

pluikens · Jun 19, 2018

Which clam species are you keeping and want to keep in the future? Different species exist at different depths in the ocean so they have varying lighting needs. Take a look at: https://www.advancedaquarist.com/2011/3/inverts