Possible Silicone Issue on New Aquarium?

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swyn created the topic: Possible Silicone Issue on New Aquarium?

Hello all! I am hoping for any opinions on a 75 gallon Marineland fish tank I purchased a few weeks ago. I just noticed today that there is a light spot in a portion of the silicone and I'm not sure if there is any cause for concern. I emailed Marineland and I am waiting to hear back, but I am hoping for an unbiased opinion. There is no leak in the tank yet and I'm worried that this may turn into one in the future. I have attached photos below.

photos.app.goo.gl/wevjjYB9jT8HaVXT2
photos.app.goo.gl/UG1EscFkLScsUeHc2

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Suprd71 replied the topic: Possible Silicone Issue on New Aquarium?

Can you feel if its a piece of foreign matter? With black silicone, it isn't an air bubble. Looks to be imbedded whatever it is, and I would say if it isn't leaking now, it likely wont. ML tanks have a lifetime warranty to the original owner. If you bought this new, and are overly concerned, simply return it for a replacement


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swyn replied the topic: Possible Silicone Issue on New Aquarium?

Thank you! It feels completely smooth from inside the tank so I think that is a good sign at least. I just want my new oscar (and floor) to be nice and safe! :)
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Suprd71 replied the topic: Possible Silicone Issue on New Aquarium?

Welcome to OFL btw.... how about a pic or two of the new Oscar?


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swyn replied the topic: Possible Silicone Issue on New Aquarium?

Just as an update for anyone who has a similar issue. I heard back from MarineLand and they are refunding me for the tank. I can't believe it! I guess this gives me a good excuse to get something a bit bigger for him!

Here's my baby oscar (only two inches)!
photos.app.goo.gl/gRlsAmWPNOKlRK4w2

Thank you Suprd for your input!
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Suprd71 replied the topic: Possible Silicone Issue on New Aquarium?

Alright, good news. Just to clarify, they are refunding or replacing the tank? Refund and you keep it anyways? (Bonus !) I like your thought of a bigger tank. While the recommendation is a 75g as a minimum for Oscar, an adult Oscar of a foot long or better is really cramped in 75g or really any tank of 4ft length. Makes more work for the owner as well. 2-3 water changes a week as opposed to say one large volume per week if you had a tank in the 125g range. Oscar is a large bodied, messy cichlid that does not do well in cramped quarters or iffy water quality. Now.. just a quick query on your new setup... did you cycle the tank before adding Oscar? Are you aware of, have knowledge of how the nitrogen cycle works in the aquarium? This is critical in new setups. Fish must be protected from toxins that will be present in un-cycled systems.


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swyn replied the topic: Possible Silicone Issue on New Aquarium?

They are refunding the tank. I'm not sure what they will want me to do with the old one just yet. Either way I won't use it as I don't really trust myself in resealing it. I decided to get a 100 gallon acrylic instead, so I shouldn't have to worry about the seals as much. I'm not really thrilled with the prospect of scratches though! Unfortunately, 5 ft is the longest I can go.

I do know of the nitrogen cycle but it was only cycled for a week so I'm sure it's not there yet. I use Seachem Stablility daily and I have a Fluval fx4 so there should be adequate filtration for him (he is and will be the only occupant). I test the water daily and I have been doing 2-3 50% water changes a week, though I really don't need to -- no ammonia, nitrites, or nitrates present (at least undetectable by the API liquid testing kit). He's not eating a ton (I'm giving him Northfin 2mm pellets) and, given his size, probably isn't producing a lot of waste just yet. I'm actually kind of worried that the bacteria may be dying off due to a lack of food! Since I had to move him, he's back in his hiding stage but I see some food gone.

He's in a 75 gallon now that I was actually going to fill with some medium sized cichlids this weekend. It was kind of fortuitous that I saw the problem when I did!

I've pretty new (maybe a few months) to keeping fish and have only had community fish up until now.

Thank you for your advice!
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Suprd71 replied the topic: Possible Silicone Issue on New Aquarium?

You are on a good path forward, more than most newbies. Couple of cautions... don't ever get complacent with water changes. Oscar thrives on clean water, the more the better. Keep up with 3x weekly. Do NOT consider adding any more fish, the increased bioload will only make more toxins, and the as yet uncycled filter cant handle it. Fluval FX series are great filters, I have them in use many years. Your FX4 should have both baskets full to the brim with bio media(ceramics). You need much more than the filter comes with. Do not use any carbon, its harmful long term to cichlids. While young, try to get Oscar on a varied diet. Try some fruit and veg pieces. Some raw shrimp, cod or tilapia from the groc store. Earthworms, mealworms, maybe some crickets. Never use feeder fish, all bad. Freeze drieds are great. Krill, shrimp, tubifex worms all make great treats. Good job with the Northfin pellets, its a superior feed.


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swyn replied the topic: Possible Silicone Issue on New Aquarium?

I was surprised how the Fluvals do not come with any biomax at all. They come with the pre-filter rings instead. I've read that they can house some bacteria, but not as much as biomax. I'm running the pre-filter rings in the top tray with biomax in the bottom. Should I replace the pre-filter rings with biomax as well?

I haven't heard that carbon is dangerous to cichlids before! I use a little bit, but just the carbon-infused circular pads.

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Suprd71 replied the topic: Possible Silicone Issue on New Aquarium?

Yes, more Biomax. It is porous and has overall more surface area to house a bigger beneficial bacteria colony. I let the wrap around sponges handle mechanical filtering, baskets full of ceramics. When you get more Biomax, toss those carbon pads. Carbon has a specific purpose in the filter, that being to remove medications, but should never be an everyday component of the filter. FX4 with a lower gph than the FX6 makes a better bio filter. Take advantage of that using as much bio media as possible


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