which silicon is aquarium safe

[reefguy210]

i have some window and door sealant i got from home depot that i was wondering if i could use on a DIY sump. its window and door sealant, silicone II 100% silicone sealant.

it has something about a bio-sealant and mold/mildew protection.

is this ok to use or is there a specific type i should look for?

[LoneStar]

I have been told to use Silicone I from either HD or Lowes. I'm going to need to get some too but hopefully someone can correct me on this.....

[Bill S]

No, do NOT use anything for windows/doors, or anything that is not 100% silicone. There must be NO additives.

[hobogato]

it has something about a bio-sealant and mold/mildew protection.

this makes it a no-no.

i always use silicone I and make sure it DOES NOT have mold protection.

[reefguy210]

ok, so 100% silicone with no no mold protection. they had some of that at home depot. thats where i got this tube from. ill go back there monday when i begin the project

[hobogato]

I always use Silicone I, not Silicone II. i have tried both, and the #I seems to work better. it also smells identical to the expensive stuff you buy at aquarium shops that is lable for use with aquaria.