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Are you able to measure PAR at any height change you can make temporarily. Like if one more inch works. You know... it fits and puts the PAR where you want it. Could we possibly 3D print new mount leggs?
A quick search and I found one called a matrix pattern. And there are others. They are T5 plastic sleeves that go over the tube and a simple rotation of the sleeve adjust the amount of diffusion
I like the screen door mesh idea. But yes you absolutely can diffuse the T5 in fact they make diffuser sleeves for fluorescent tubes that have a radiant design that you simply rotate the sleeve to get the amount of diffusion you want.
I second the above advice. Your alk is fine. Steady is better than elevated. That’s not to say elevated is bad. There are advantages to it. But it’s not necessary at all. If your tank naturally settles at 7.2 then kudos
I know few people with the heart courage and good nature as you buddy. I’m confident if anybody can work through this difficult time it will be you. If you need anything. Don’t hesitate to ask.
I would be happy to be corrected but I don’t believe I am yet to see any credible evidence. Of Rock “leaching” phosphates. I have seen people post it dozens of times as a possibility. And have seen it Theorized. But that’s it. Let me know if anybody has seen differently
Run the refugium lights when The lighting on The main tank is off and vice versa. the reason for this is to stabilize pH, which may fluctuate somewhat between periods of varying photosynthetic activity.
I had some bubble algae on some rock in my quarantine tank. (Guess that’s the point of a
Quarantine). I found emerald crabs to be quite useful. But I did carefully remove what I could by hand first.
Blue Zoo Aquatics. Claims to Be able to get blue ones in 6 sizes. However. This is a difficult animal to keep. And it WIILL. Not might... eat anything that accidentally wonders into its reach. Of course beauty is in the eye of the beholder but given this animals reputation and the fact that...