Petco 40 Breeder Dollar per Gallon Sale = Junk

03LightningSVT

New member
Caveat emptor! Another perfect example of "you get what you pay for" :headwalls:. What is wrong with this picture? Hint...the tank is upside down with a level/straight edge on it for a reason.



I'm in process of building a 40B peninsula set up with a 40B sump and hit a "little" snag. While working on the tank stand (in background), I placed the Petco 40B dollar per gallon tank (going forward this glass tank will be know as POS) on my stand. This was done in effort to locate the position to cut clearance holes for my plumbing to pass through the top surface of the stand.

Notice lower left corner of pic, prior to setting the POS on the stand, I already drilled the back glass for herbie style drains, two returns and constructed my own acrylic overflow box.

When I placed the POS on the stand, all I could think and say was something the mods would rightfully edit on this forum! The POS rocked like I set a rocking chair on the top of my stand with huge gaps at both ends of the POS! Being a tool & die maker with 25+ years experience and someone who has carnal knowledge of .0001" type precision, I knew it could NOT be the stand I built.

Hence, I took the POS off my stand, flipped it over and set my level on it. FYI, my level was calibrated less than a month ago and was out less than .002" over the four foot length. The problem became very apparent, the POS was constructed with a .144" bow. See pic with gage block in gap.



I have zero confidence in this POS's ability to remain structurally sound and intact when filled with water. I see no options other than to dismantle and reconstruct the POS using Momentive RTV 100 series silicone or trash the thing and start over.

Uncleof6, I'm calling out to you, if you have alternatives, I'm open to your ideas. You have repeatedly shared your plethora of knowledge in this arena and for that, I thank you and thank you in advance for any response.
 
If I'm not mistaken, that tank has a Tetra logo on it lol. If Petco had manufactured the tank I might see where you'd have an argument.

I do agree that they should have stuck with Aqueon brand tanks.
 
Regardless of who built it, it is not built correctly. I'm not trying to blame anyone, just letting everyone know what is out there. POS has been drilled, can not return to store.
 
if you drilled it.. then just go buy another..
It is NOT worth the time to repair it.. Its only $40.. go buy another.
and this time before you drill it.. check it.

stuff happens..
I might even take it back even though it is drilled and show it to a manager.. A good one will still allow it to be returned or at least give you a deal or something..
 
Of course its probably just how the bottom trim has been attached so it should be a fairly easy fix but IMO its still not worth the time.
 
After a round of golf (took my frustrations out on a golf ball...actually played pretty good), I decided to check the other 40B I planned on using for my sump. This tank was much better, only bowed .115"! Great! Now, I'm the not so proud owner of two POS's. Both are Tetra tanks, both were built by "T-1" and have build dates of April & June of 2014. Further checking revealed the top trim on both tanks is dead nuts flat. I suspect (as mcgyvr noted above) the bottom trim has been attached in a manner less than remotely close to ideal and IMHO potentially dangerous. I will take my level along when I attempt to exchange both tanks, wish me luck, I think I'm going to need it, Thanks!
 
If they won't take them, heat and remove the lower trim and silicone it back on with weight. The lower trim is not structural.
 
Never heard or read any success stories about using heat to assist in plastic trim removal. I would tend to think the plastic would melt before the silicone lost its adhesive properties.

Anyway, after further inspection of the bottom of the drilled tank (POS #1), I noticed the trim was installed nearly flush with the bottom tempered glass. Interesting...this may account for .010" - .015" of the error but where is the remainder? Pulled out my pair of 1,2,3 blocks, set one at each end of POS on the glass and a 1" parallel near the center brace on the glass and set my level/straight edge across all three points. Results? If you guessed dead nuts flat with no gap across the three points, you would be incorrect. The gap at one end is .034", which means the tempered glass on the bottom of POS #1 is warped. Take the trim mounting error + the glass warped error + no doubt some margin of error in the injection molded trim itself and I think I found all the contributing factors that account for the lame condition this POS is in.

If I really wanted to know exactly what and where everything is going wrong, I would take this thing into work, set it up on a grade A surface plate and touch off multiple points with a Faro CMM. The report that would be generated would no doubt be an eye opener to Tetra. I realize we're dealing with a mass produced glass box and not a Swiss watch here, but really? Really? Going forward, I will try to return both tanks for a full refund and NOT exchange. I'm thinking, most likely, they all exhibit these traits to some degree. On the lighter side, maybe I should just buy a Tetra stand, it probably has a matching bow :) Caveat emptor!
 
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Wow that's bad! I've seen a tank where the side glass is angled in almost an inch, [Didn't buy that one] but never warped, tempered glass.
 
Here is a pic of both tanks stacked bottom to bottom. While the error/bow in each is exaggerated in this pic, the gaps are obviously there on both ends.



Here is a pic of the gap and a scale on ONE end. When I apply weight to one end to eliminate the gap on that end, the gap on the opposite end doubles to about .300" or nearly 5/16" give or take!



Caveat emptor!
 
Wow that's nuts... Hope they let you return it as this is clearly not an issue caused by drilling the tank.
 
i would just get some foam pads... the ones they sell at sears and comes in squares. and place it under the tank. that will take any gaps out and equalize the pressure. cheaper then buying a new tank. and cheaper then buying silicone glue...
 
Just want to throw this out there. Have you ever considered what it is going to do when you put water in it? I would assume if you have a flat surface your are putting it on it will lay flat from the weight of the water. I dont think this has any structural relevance its slightly bowed as the silicone does have a little flex to it no mater what.
 
most of the time when you put a full tank on an old school angle iron stand the ends of the tank touch the stand and the angle iron bows and leaves a gap under the center of the tank...so i guess they dont find a flat bottom a priority...be really scary to think it might be done on purpose to fit better on a bowed stand
 
get a sheet of styrofoam insulation from HD, cut it to fit both footprints... done... I'm in the industry as well and I understand your frustration, but its not the end of the world. There's always a work-around.
 
Could you possible sand the trim to make it level? It might be an easier fix than pulling it apart and trying to stick it back together. I mean it's a 40 g tank, taking of a fraction of an inch in the middle is hardly going to affect the tank much at all.
 
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