Phosphates are essential for the growth and health of plants, but if the levels in your aquarium or pond are too low, it can lead to stunted growth and poor water quality. The good news is that there are several ways you can increase phosphate levels in your tank or pond. One way is to add a commercial product such as liquid fertilizer or powder-based phosphate additives. These products should be used sparingly according to manufacturer's instructions, as they contain high concentrations of phosphates which could cause an imbalance if overused. Additionally, you can fertilize with fish waste using a water filter media bag filled with crushed coral substrate; this will slowly release phosphates into the water column over time without causing an overload. Finally, adding live rock from established tanks is another great way to naturally boost phosphate levels while also introducing beneficial bacteria and other microorganisms into your system.