Okay long story short I bought my biocube used from a guy who has had it established for 4 years before me and I’ve had it 5 months now so I was doing some cleaning in the back chambers and was in the 3rd chamber and under the sponge I find this bag and I had no clue it was ever there lol. I think it’s a bag of older gfo?? Anyone ever see what brand or kind it is because I kinda like it