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Centropyge potteri, sel., dis. f's   1/22/18
Hello. After much reading and research, I decided to purchase a C. potteri for my 200 gallon Hawaiian biotope tank.
<A good fish in the right circumstances. I take it you read my piece on WWM re this Centropyge>
I have about 200 lbs of live rock and lots of little caves and hiding places. I placed it into a 30 gallon QT with about 5 lbs of live rock. In short, after five days it seems to be not yet eating. I've tried live blood worms, various frozen foods, and nori, both with and without garlic. The fish was purchased from Live Aquaria.
<Considering the species and where you acquired it (I know in turn where they bought it/QM, and in turn who caught it in HI), I'd expedite this fish, place it in the main/display tank>
My thinking is that I should bring the specific gravity up to 1.025 (it was shipped at 1.020) over the next few days, then place it in the main tank afterwards. It is very active and appears very healthy, and I believe the folks at Live Aquaria that it was eating at the facility. I also wonder if it is eating when I'm not watching.
<Possibly>
In any case does this seem like a sensible protocol to follow?
<As stated. I'd move it. Bob Fenner>
Thank you.
Bruce

Center Brace Repair for 46 Gal Bow Front Tank; retrofit, replacement   1/22/18
Hi There!
<Hello Sierra!>
First of all, thank you so much for the work you do at WWM! I have had many questions answered here.
<Ah, good>
I need a little extra help with my current problem. I have a 46 gal bow front tank by AGA, and the center brace in the top frame is cracked.
<I see this in your excellent pix>
There was significant bowing (~1/2") so I drained it and moved everybody to another tank, but it's crowded and not a long-term solution. I initially planned to repair the center brace with plastic cement
<Mmm; no; won't work>
(such as weld-on 16)
and to put a new acrylic brace on top of it, which I would plastic weld to the old brace and to the front/back of the plastic frame. However, I'm worried that the entire top frame is not in good shape so I don't want to depend on it too much for the structural integrity of the tank.
<You are wise here>
The attached photos show the broken center brace, but also some cracks in the corners of the top frame that make me distrustful of any fix that depends on the strength of the top frame.
My next idea is to make a glass brace and silicone it to the tank below the plastic frame. However, I have a couple questions about this: (1) This seems obvious, but how can I precisely measure the curvature of my tank?
<There are a few ways, the best to make a template... Either with bright light and paper (from above once the broken cross support is cut away, or with a tool (contour gauge, profile gauge...) that has many pins that can be pushed out to make the same shape against the glass>
If I go to a glass shop to get a piece cut, I'll need to know the exact specs.
I can calculate the radius of curvature if I assume that the curve of a bow front tank is the arc of a circle, but is that true?
<Mmm; I'd go the measure or template route above>
I have not been able to find any resources on the typical shape of a bow front tank, whether it is truly circular, or catenary, etc. (2) What width and thickness should I use?
<At least the same as the tank... I'd use bigger, likely 1/4">
My tank seems to be 3/16" glass (at least the back panel, see attached photo). Should I use 3/16" for the brace as well?
<... as stated>
How wide should it be (the tank is 36")?
<Need to measure with the tank empty>
(3) Having the brace attached directly to the glass and not the plastic frame should remove a lot of stress from the frame, but I'm still worried about those cracked corners. I'm thinking I could reinforce them with some plastic cement, do you think that would be ok?
<Finally to the real answer. I'd buy a new frame, entirely cut away (watch your hand here) the olde, clean up (single edged razor blades) the old silicone and replace it. AGA is now a brand (Aqueon) owned, run by Central Garden & Pet... Either you or your LFS/dealer (I'd do it myself), might contact them re selling you a new top frame: https://www.aqueon.com/products/aquariums/specialty-shape-aquariums>
Thanks you
in advance for you help! Your expertise is much appreciated.
Sierra
<Welcome. Bob Fenner>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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