Yellow Stuff

[Maine Reefer]

I have been cycling my first saltwater tank for about a week and a half, and I am noticing some yellow stuff on all the corners of the aquarium. I am wondering what this stuff is?

 

[Crabs McJones]

I have been cycling my first saltwater tank for about a week and a half, and I am noticing some yellow stuff on all the corners of the aquarium. I am wondering what this stuff is?

Any pictures?

 

[nautical_nathaniel]

+1 on pictures but it may be the start of a diatom bloom.

 

[Maine Reefer]

+1 on pictures but it may be the start of a diatom bloom.

I've noticed that my ammonia has decreased a lot since I've seen it.

 

[nautical_nathaniel]

I've noticed that my ammonia has decreased a lot since I've seen it.

Ammonia decreasing is a part of a normal cycle and diatom blooms are common with a new tank

 

[Maine Reefer]

Ammonia decreasing is a part of a normal cycle and diatom blooms are common with a new tank

It is almost in every corner (counting baffles in sump) except there is not of the stuff in the corners of my filter sock/protein skimmer compartment.

 

[Maine Reefer]

It is almost in every corner (counting baffles in sump) except there is not of the stuff in the corners of my filter sock/protein skimmer compartment.

Here is a photo of what it looks like.

 

[nautical_nathaniel]

Okay, that doesn't look like diatoms necessarily but it does look like an algae of some sort. It's kinda odd how it isolates itself to just the silicone.

 

[Maine Reefer]

Okay, that doesn't look like diatoms necessarily but it does look like an algae of some sort. It's kinda odd how it isolates itself to just the silicone.

Yes, It is only on the silicone. But like I said before, the protein skimmer compartment is perfectly clean.

 

[Crabs McJones]

Is this a brand new or used tank? Weird that it's only attached to the silicone

 

[Maine Reefer]

Is this a brand new or used tank? Weird that it's only attached to the silicone

It is a used tank. And I resiliconed it, but I used the right kind of silicone. Aquarium silicone.

 

[Scorpius]

Sure it's not underneath the silicone? That doesn't look right...

 

[cmcoker]

Looks like a bacterial culture plate to me..

I think some silicone release acetic acid when curing, wondering if that's a factor and encouraging bacterial growth on the silicone.... Idk just a guess

What's the texture of the stuff?
How long did it cure before you filled it up?

 

[Maine Reefer]

Sure it's not underneath the silicone? That doesn't look right...

No it is not under the silicone. I noticed it a few days ago, and I re siliconed it months ago.

 

[Maine Reefer]

Looks like a bacterial culture plate to me..

I think some silicone release acetic acid when curing, wondering if that's a factor and encouraging bacterial growth on the silicone.... Idk just a guess

What's the texture of the stuff?
How long did it cure before you filled it up?

It is slimy, but it doesn't come off easily. It had plenty of time to cure, I think between two and three months.