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I don't have too much light spillage in the room, and the light intensities are turned down a good amount. I measure 9" to the top of the water.Is that tank 22" wide x 11 x 12? Seems like those lights should need to be at around 5-6" from the water to keep all the light in the tank. (90º lenses?) Having a reef-lit tank is better than having a reef-lit room....or at least my wife thinks so. If yours agrees with mine, lowering the light would help a lot.
It shoots a little more down the center, the flow out of the powerhead is pretty gentle.Perfect. Here's my interpretation laid over the birdeye view...tell me what you think (you're there).
Blue appears to be the main trajectory of flow.
Hexagons are the corals that appear to be "in front" of the flow pump.
Green get good flow, but in so doing block flow to the others.
Yellow is partially blocked and red is totally or very blocked.
From the front view, it looks like the purple Stylo(?) is directly blocking flow and the other two are just helping.
The other downstream corals are probably more tolerant, but may also actually be getting better flow due to the return flow back to the pump.
An alternating flow current (with two pumps instead of one) would take care of this, BTW....not a big deal.
Thanks! I'm excited to get it going steady and just leave it to grow out. My previous tanks were so big and empty in comparison to this one that it'll be nice to get a filled out tank more quickly (I even enjoy it how it is now)That's a sweet little tank, BTW. Nice!!
I don't have too much light spillage in the room, and the light intensities are turned down a good amount. I measure 9" to the top of the water.
I never though of that. Alk was always what I watched out for.Problem is water flow change is a killer for SPS. One of the most common causes of lost.
I actually have a jebao sw2 and a Tunze 6040
I never though of that. Alk was always what I watched out for.
I dunno if you can easily change the height just to try it, but if you can, I'd give 5" off the water a try to see if you still think coverage etc is fine. (Should be since you still have 10" x2 of coverage at the surface.) That would be A LOT less light in room, plus your tank would use less power since you could turn the lights down even more. (You currently have about 18" of coverage on an 11" tank....about 7" of "extra")
Just a thought anyway...not related to the issue.
Not directly...
Now that we're talking about light, those corals are also at the intersection of both lights....your (probable) hot spot. Corals there will require the most flow and the most nutrients to maintain themselves compared to corals in lower-lighting zones, so if there's a paucity of either flow or nutrients for them (they go hand in hand)....again a potential contributor to the problem.
I might've suggested something a pair of 6015 or 6025 instead since you're running "peninsula style"....XX-wide flow isn't that ideal since your space is (from the pumps view) kinda XX-narrow.
You can probably still get some great flow with those pumps though. The 6040 is strong and with the deflector can probably be fairly well hidden.
I didn't think about the mounting height vs "coverage" area - just bought a pre-sized pipe at Home Depot and clamped it to the stand [they only had 48"]
Could maybe buy a second pipe and ask them to cut it in the store to a shorter length
You be the judge if it's worth it....you'd have an adjustable light that way tho! It would definitely almost eliminate any light coming into the room, along with improving efficiency so you'd be able to turn them down more. The only question is whether you'd like it less or more or the same or whatever....my guess is you'd like it fine, but it's according to personal taste of course.
(Get a hacksaw and cut it at home?)
I went with the Jebao because it is controllable and I figured i'd use a pulse mode or a ramping mode [once I get my Apex this week, I may connect it to the Apex]
And I went with the 6040 after having a number of people suggest it to me, and this one is also controllable and should work for this tank, and to supplement flow in future [larger] tanks as well if needed
* This pump is also by far the smallest I found when searching
Nanostream
6015 2 x 1.5
6025 2.5 x 1.5
6045 3 x 1.5
6055 4 x 1.5
6095 3 x 3
I'm in an apartment, so no garage to use the hacksaw in... but
Home Depot cuts them for free, and they make a mess that they have to clean up! It's only around $5 to get a new pipe, so totally worth it. The way the light is mounted, I won't/shouldn't have any issues swinging it out of the way, so 6" above the water would still work great