You have me confused Victor..
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I have a bit of green/brown algae in the tank. They produce CO2 that uses alk.
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I am fighting bryopsis in a small tank and have to say I have a LOT more algae than in your 90. I am seeing no difficulties keeping my alk at 12dKh all the time. And if I desired it takes nothing for me to push those numbers up.
From what I have read your Ca reactor isn't doing it's job. If you are having to add buffers to keep the Alk levels up you need to increase the CO2 injected into your Ca reactor. A Ca reactor is there to maintain your levels. If you are adding buffers it isn't doing it's job. IMVHO.
I know you know the chemistry behind all of this but, I can keep my Alk at the levels you want in my tank with no use of buffers, and my tank is heavily stocked in Ca and Alk loving corals in comparison to yours. Just an assessment I have made from seeing your system and it's occupants. I keep my tank at 12dKh as they love it and grow like weeds but can crank it up a few notches if I want. I have done it but prefer it at 12.
Maybe I am lost in space tho. But when you need to add buffers something isn't working properly, IMO.
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Marc,
What do you keep your Alk at? Curious to find some differences in our systems besides lighting. Want to see if I can get an idea as to what causes the color differences between the purple digitata in my tank and yours.
[ 30 January 2002: Message edited by: DJ88 ]</p>