am i overreacting to my aquarium?

I have a 29 gallon aquarium with black sealant and i just bought it two days ago. I got the filter, gravel, decor and plastic plants up and filled it with water. everything you were suppose to do before putting fish in it. added some AFI aquarium salt and water conditioner. my concern is, when i was taping the background, i noticed a small chip on the inside of the tank where the corners are, its in the middle of the tank, and its covered by the black sealant and its about the size of half of the top of a pencil eraser. should i be worried about it cracking and leaking later or am i over reacting to something minor? it looks like whoever made it, a small piece of glass chipped off and he still used it to make the aquarium. i bought it from petsmart and it has no leaks at all. Ive been checking up on it atleast 5 times a day and it doesnt seem to get bigger. i mean it is inside the sealant so it shouldnt get any worse right?
i was thinking about adding more sealant to add a second coating, but im not sealanter and it does look very nice with just the black on the edges, i know for a fact i would get the sealant messy in that spot and might regret it later while looking at it. i know i would do this because when im bored with hot glue, i end up making hot glue figurines like a snowman or just alot of strings of hot glue. lol. its quite amusing

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How much should I sell this aquarium for?

I'm trying to downsize a bit since I'm moving and I also need some money. I have extra tanks and aquarium supplies so I thought I'd set up another tank and sell it, therefore getting money and getting rid of stuff, which is what I need to do right now. So, I have a 15 gallon tank, but it has no hood or canopy or whatever. I put in a brand new Fluval U1 filter, 50 watt heater, and an air pump. I also put rocks, two plants, and a castle ornament. The filter also has a new extra cartridge and I put a background on the tank. How much do you think I could sell that for? Also, I have a 10 gallon tank, do you think I should do the tank set-up in there to sell it, and then sell the 15 gallon by itself separately? Neither tank has a hood thing though. Please let me know what you think, about the prices and how I should sell it (15 gallon set up and 10 gallon separate, or vice versa, and what prices would be best for each). I need to get rid of stuff since I won't have as much space and some money would help so much with the moving. Thanks.

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Aquarium background help!!?

I have to male betta's in a ten gallon divided tank. The divider is slightly see thru, and the bigger king veiltail is constantly flaring at the other crowntail. I tried covering it up with plants, but it doesn't work. My veiltail has flared so much that he has a tear in his fin that gets bigger and bigger. My question is:

Can I put aquarium background IN the tank to cover the divider. If so, how do I get it to stick?

Please help soon!!!!
Could I put laminated black paper taped to the divider in my fish tank?

Valentine's Day - Hearts - Fish Tank Aquarium Background