A tank collects solids. Then liquids flow out to the leach field. Bacteria will decompose only some solids. Eventually the tank must be cleaned out.
Bacteria is to increase the decomposition. But once tank or field water is observed on the surface, then nothing short of digging can fix it.
In some cases, it might be a broken or blocked pipe from the tank to the field. In worst cases, the leach field must be dug up and reconstructed. Once water appears, then no 'magic bottle' will fix it. Especially with so little rain. And when earth in that venue is sand - soil that perks quite well.
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