Moorish Idol - Take 2

[Aquattro]

Originally Posted by Samw

$700? Sell more frags instead of dumping them onto your lawn.

And another 100 for the module. US. So near a grand. I'll just keep the pumps pumping I'm years away from frags lol

[Samw]

Originally Posted by Aquattro

And another 100 for the module. US. So near a grand. I'll just keep the pumps pumping I'm years away from frags lol

Ok, just note that powerheads (nor external hang on back filters) really don't oxygenate the water much according to the article and my own tests and results. You really need to break the water surface with really violent splashes that would really make a mess or for ease, just use the skimmer/airstone

If there's a place to rent DO meters on the Island (In Burnaby, there's Hoskin Scientific) you could find out what your morning DO is with your pumps dialed down to its minimum and compare to when it is running at its max. Just take your angels and MI out of the system when you are testing for minimum levels and keep them in other oxgenated tanks (sump?). Although keep into consideration that the levels in the display tank would be a bit lower once those demanding fish are put back in.

[Aquattro]

The surface of my tank would probably be classified as violent I pump from the bottom up with a couple of the pumps, it can't get much more violent and keep the water in the tank. Much more flow than I had in the 90g with all the fish before going into the DT. I think the heavy cyano and hair algae had a part in the low levels at night as well.

[Samw]

Originally Posted by Aquattro

The surface of my tank would probably be classified as violent I pump from the bottom up with a couple of the pumps, it can't get much more violent and keep the water in the tank. Much more flow than I had in the 90g with all the fish before going into the DT. I think the heavy cyano and hair algae had a part in the low levels at night as well.

Well, that's the thing, you have lots of flow. But flow doesn't oxygenate water. Right now, we're guessing. Once you have the readings, then we won't be guessing. Yes, algae, cyano, bacteria and tons of stuff will consume the o2 at night. But as the article showed, an airstone or skimmer, took care of it.

[Aquattro]

Breaking the surface is what forces CO2 out of solution, not adding air bubbles. All an airstone does is force water from the bottom to the top, breaking the surface, so a pump doing the same is the same.
I also have a skimmer going, which is a big contributor to off gassing CO2.

An airstone isn't going to happen, too much salt creep and bubbles

[Samw]

Originally Posted by Aquattro

Breaking the surface is what forces CO2 out of solution, not adding air bubbles. All an airstone does is force water from the bottom to the top, breaking the surface, so a pump doing the same is the same.
I also have a skimmer going, which is a big contributor to off gassing CO2.

An airstone isn't going to happen, too much salt creep and bubbles

Yes I realize that, but you'll need a small water fountain to get the same results as the air stone or protein skimmer. Even hang on back filters which breaks the surface does very little compared to the surface breaking of an airstone. But OK. Maybe you have a lot more splashing at the surface than I thought (which would also result in salt creep).

[Aquattro]

Originally Posted by Samw

Maybe you have a lot more splashing at the surface than I thought (which would also result in salt creep).

I can hear it in the next room No salt creep, it's centered in the tank.

[Samw]

Originally Posted by Aquattro

And another 100 for the module. US. So near a grand. I'll just keep the pumps pumping I'm years away from frags lol

This is the newer model of the one that I use. $349 USD only. Excellent condition.

http://www.ebay.com/itm/Oakton-DO-11...item5670b2ccf5

[hillegom]

Why not incorporate more waterfalls in the sump between the different chambers? A few more pieces of glass at different heights.

[Samw]

The problem isn't in the sump. The skimmer is already efficiently oxygenating there. It is when the return pump is set low and the water being returned to the display tank is reduced that is the concern.