okay so i used ge2 silicone on some veneer stones and made caves for my oscar tank. i added them in after curing for a day last night. this morning both my oscars were lethargic and at the bottom of the tank only moving when my hand got too close. none of them were eating. i didn't know ge2 wasn't safe. i did a 40% water change and removed the caves. what else can i do? please help!