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That is the question! Ba dum tssshh... I just got a used 75 gallon tank and have determined that there are no leaks! However, the silicone has bubbles in it and it a bit worn away. The first picture is the bottom rim of the tank the second picture is the side corner. The big problem is that my fish are currently in an un-cycled and overstocked tank (I've been doing daily water changes to keep up with the poo). The new tank is going to be cycled. Should I go ahead and cycle the tank or should I reseal it? If I go ahead and cycle will the tank be okay with the current seal? If so, how long? Or, it is bad enough that I am going to have to reseal? If I need to reseal, right now I have GE Silicone 1 for windows and doors. It is 100% silicone with no additives (including fungicide). I've been researching and some people say that this isn't strong enough for aquariums because it is not an adhesive silicone. They suggest that I used Momentive RTV108 silicone because it is industry-grade and is adhesive. What should I use? Has anyone had luck with GE Silicone 1 on a larger tank (75 gallons and up) ?
Hi Guys, So I got a free 30 gallon long tank off kijiji. I got to the house and the tank was full of grungy brown/green water. You couldn't see through at all. I was shocked…poor guppies. We emptied it (while I wondered if it was even usable) and carted it home. I scraped it down for four hours, the algae was like cement. Came to find out that they set it up four years ago and only ever added water as it evaporated. They didn't know you could test the water. The filter did not even have any media in it. I was tempted to take a sample and test it, but I didn't want to offend them. Anyhow, as I scrubbed and scraped, the seal started coming off in strips. I scraped it all off, pulled the whole thing apart and resealed it. Tonight is water test night. This was my first reseal, so I am very excited to see if it worked. Man that stuff smells bad! Side note: I took the last of their guppies because I just couldn't leave them. 5 of six died that night and the last died the following morning. Poor guys. Keep your fingers crossed for me:)
So, before I move I will be selling most of my tanks. I am keeping my 70, 36, 5 and 2.5's and selling my 2 10's, 20L, and 55. I had bought one of the 10's and the 55 damaged (before I knew what questions to ask). The 55 has a crack in the corner that doesn't leak, and the center brace is missing. The previous owner used it as a terrarium and I assumed they removed the brace themselves for that reason. The 10 has a chip in the corner, about 2 inches up, and has a leak. My question is, how do I go about repairing both so they can be used for aquariums (long term)? I am using the 55 right now, so that one will be repaired and sold at the last second. After both are repaired, what would be a fair price for them? I am using Fang's technique of getting a flat long metal bar and fitting it over the center, so when the tank expands it will brace itself on the metal bar and fit without slipping. I have never resealed an aquarium before. Do I need to remove the original silicone if the tank is not leaking? What about for the chip in the 10? For the 55 I would charge 50 dollars after the repairs are made. Don't really know what to charge for the 10. I might just give it away if someone wants it without the repairs.