Have you got any macro algae in there? I had a problem with it for a few months, myself, but macro algae and slightly reduced lighting periods seem to have worked for me.
He could. It's probably more effective if he turned it into a mini-refugium like I used to have by adding LR rubble, some macro and put a small light over it.couldn't he just load up the AC filter with live rock? mightaswell use it if he has it
Direction matters a whole lot. The AC is just spilling water downwards across a wide area. Put your hand underneath and you won't feel a lot of water displacement. Move your hand any distance away from directly under the outflow and you won't feel anything. A good propellor-driven powerhead, on the other hand, can actually push water all the way to the other side of a tank and even bounce it back the other way.In a 20 gallon tank, that 110 must kick out a lot of flow, no? Or does the direction of the flow matter?
480 is quite a ways off of desired calcium levels in a reef tank. You have to understand that calcium, alkalinity and magnesium have a very close causal relationship with each other a bit like how pH, CO2 and KH are interrelated in a FW context. There are ideal balanced levels of calcium, alkalinity and magnesium that should exist in a reef tank. Have a read of this:otter feel free to join in this thread.
Fkshiu, I am using api test, I don't have the mag. About the calcium I never really dose anything. I am not 100 percnet sure but I think Oceanic salt starts with 500 at 1.025.
I figure if I keep up with weekly water change I didnt' need to dose.
480 is right after a 5 gallon water change at 1.025 with a refrac. I have a barebottom so i dont' know much about sand. The skimmer I am using is a Aqualite skimmer at first i was using a tunze9002 but for some reason after each water change it will take up to 2 to 3 days before skimming again. Talk to Tunze it says doesnot belong in a aquaclear110. The aqualite I get instant skimming not as dark but more wet. I am happy with it compare to the tunze.
You are right about the flow, it seem the diatom is appearing right below the Aquaclear 110 and the far back corner opposite to my K2. And those parts donot have any coralling alge. It seems maybe that is the reason. I will add a k2 or k3 to the tank.
I'll post a pic after I get the another koralia to see if i am placing it in the right spot.
GFO question, how long do they need to be replace? do they change color overtime?