Hello! I have a lot of aquarium tools and decorations. Im willing to consider offers as well! Message me with questions. Misc aquarium decorations: take all for $10. Shrimp hides $3 a piece $5 for larger cave. Hydrometers: $10 for both AquaZen Nano CO2 regulator: $30 (unsure how much co2 is left but you can get refills.) Co2 drop checkerGlass Clip Nano CO2 Drop Checker: $5 Milwaukee co2 regulator: $15 (Un sure of condition. One or the gages is off so worth it if you can fix it.) Terracotta flower pot used for aquarium decor: $3 Misc aquarium chemicals: free if you want with purchase. Fluval internal water pumps: $5 each.