If you keep species that like to dig in the gravel, but you want to keep plastic plants and are tired of re-burying them in the gravel after they float up every couple of days, then do this: Take the plants out, then after they dry use silicone sealant to cement aquarium gravel into the bases of the plants. After the sealant dries, simply toss the plants back in the tank -- when your digging Cichlid moves them around, they stay on the bottom. They will be constantly re-arranged, but at least they won't float all the time!
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