My new toy...

Moose,
I like the look of the tank. The grass comming up through the prostrate red algae looks especially good. The Sargassum in the back left will look even better once it gets some height to it. Don't know what the dark, bushy red is in the back right, but its a good contrast with the grass in front of it. I also like the spare use of invertebrates here and there.

I don't know to what extent the plants will hide the equipment when they fill in, but for me the equipment is a distraction. But its challanging to get rid of in-tank equipment and still keep a simple arrangement.

It great you're getting such good growth from seagrass right after transplanting it. The people here who have been starting with seagrass just over the last year have provided me with a real education on better ways to establish seagrass.

As far as CO2 goes, $100 seems like a decent price to me, considering you'd pay $75 or more for a regulator and needle valve for a standard tank of CO2. Does the setup use some standard disposable CO2 cartridge, or is it a proprietary Hydor cartridge? I'd be a little concerned that the setup might be like buying an inkjet printer. They practically give the printers away and make their money on the cartridges.
 
Thanks piercho,
When I look a the tank, I don't even see the equipment, but then again I look at the tank 50 times a day, so those things start to blend in. I have thought about adding a bit more rock on either side to cover the powerheads more, but haven't decided.

As far as the CO2 is concerned, that seems to be the biggest negative about the system in that the cartridge is only availible through Hydor. Although, I was able to stock up with 7 of them recently, because the wholesaler who was going to carry the product recently went bankrupt, so I bought every one they had. Should last me for ~10 months...still on my first cartridge, but according to the instructions, it should be running out soon. I believe the retail cost on the cartridges was around $15, so as long as they are availible, not too bad.

Nathan
 
We still need an ingenious way to relate pH and alk to get to CO2 in ppm in our tanks folks. Any thoughts?
The drop checker method used on FW tanks may work since it does not rely on tank water to get a CO2 reading. I've recently set up a 75g macro tank and was thinking about routing CO2 from the planted FW, but haven't yet saw anything that indicates carbon deficiency.
 
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