Resealed 75 Gallon Tank

kurb

I bought a used 75 gallon tank off facebook marketplace. The guy said it didnt leak. I didn't test it. But I noticed a couple spots on the bottom where the substrate had been getting under the silicone and worked its way in quit a bit close to the corner in one place particularly.

So I decided I'm going to reseal it just to be safe. So I used my stanley knife and a flat blade and spent literal hours getting all the silicone off the inside minus between the panels. I scraped and shop vaced and wiped and repeated multiple times then cleaned it good wih 94% isopropyl and a rag to the point I found sufficient.

Now I had 2 tubes of silicone one black tube of aqueon brand and one clear tube of marineland brand. I wanted to only use the clear but I found about half way through I wouldnt be able to make the beads large as I want to and be liberal with it so I did all the seems with the clear until I ran out then I Went over the up/down seems with the aqueon (while the other stuff was still wet of course not dry) I also extended it out a good quarter inch or more beyond the clear silicone so it was on clean glass to be sure.

Question 1: Will the mixing of the 2 colors of silicone be an issue if they were used together at the same time before they dryed. My research suggests it should be fine?

Question 2: I did not notice when I bought the tank but on the top frame it was cracked on 1 part all the way through. I do not believe (but I do not know) if it was due to water pressure, but Right next to the crack there's some heavy scrapes and marks (ill show pictures) it almost seems like someone was fighting to get a filter on/off in the spot where it cracked and I'm assuming that's what happened. I cleaned the area well and ran the black aqueon silicone under it on both sides for several inches to adhere the plastic to the glass which it seems to have created a strong bond.

I did it about 4 days ago I'm waiting a full week and I'm going to fill it on my deck with my hose and let it sit a few days to test the integrity of the tank.

And the pictures:

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kurb

It actually looks less ugly in person lol... And I know the gravels going to cover the bottom. The black lines I plan to make real straight going up and down with a razor blade probly tonight. The guy was asking 150 for the tank with the stand. I got it for 125 for both and that included glass tops and light. But I bought my own light because I wanted 2x T5hos for my plants. And the stand was pretty scraped/scratched up I painted it onyx black 2 coats myself. All and all I think I got a decent deal if it holds up...
 

kurb

filled up to the brI'm no leaks let it sit on deck overnight and get from ice cold to warm and see tomarrow... couple pics with my driftwood soaking
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Dechi

I find your project very interesting. I unfortunately have anxiety and would never feel at ease fixing a tank, I would be too scared it would leak, especially if it’s a respectable size.

You seem to know what you’re doing. The stand is really nice and I think you’re going to have a very nice aquarium !

Mine is new but I put a Roost water detector besides my filter (that sits in a plastic tray), so if there is a major leak, it will beep and send me an email. Maybe something you could do as well (except you might want to put the detector directly under the tank, not the filter).
 

kurb

I find your project very interesting. I unfortunately have anxiety and would never feel at ease fixing a tank, I would be too scared it would leak, especially if it’s a respectable size.

You seem to know what you’re doing. The stand is really nice and I think you’re going to have a very nice aquarium !

Mine is new but I put a Roost water detector besides my filter (that sits in a plastic tray), so if there is a major leak, it will beep and send me an email. Maybe something you could do as well (except you might want to put the detector directly under the tank, not the filter).


The tank didn't leak when I got it but it had some silicone which substrate had worked its way under and started to peel a bit. So I decided why not redo the whole thing. I left the seals in between the glass alone and redid the entire inside with a generous layer which I let cure for a full 7 days at room temperature before the current stress test. As you can see I'm not the neatest and I made sure to go pretty far out with the silicone much further than factory does and I used marineland and aqueon silicone that claims the same used as when the tanks are made, so IMO its got to be as strong as new or stronger because I spent ALOT of time on it lol. Its in my tv room so I pay a lot of attention to it I would notice a leak right away. But I have never heard of this water detector before I will google it right now sounds like a sound investment thanks
 

kurb

And as for the cracked brace, filled right to the top I can pull on it and there's slack so it definitely wasn't broke due to bowing most likely mishandled or tugged on too hard
 

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