求翻译：专业的来说是硝化细菌的床。因为鱼便便和食物残渣会产生亚硝酸钠的有害物质，所以一般都会培育硝化菌来将其转化弟硝化盐。石头间的缝隙就是硝化菌的床。当然还不只这些，如果是草缸还含有液肥等。是什么意思？

Professional is nitrifying bacteria bed. Because the fish going to the toilet and food residue will have a harmful substance of sodium nitrite, so usually cultivate nitrifying bacteria to be transformed brother nitrification salt. The gap is between a rock bed nitrifying bacteria. Of course not enou

Professional speaking is nitrifying bacteria in the bed. Because fish food residues and harmful substances which will produce nitrite and so are generally breeds nitrifying bacteria to convert brethren nitrifying salt. The cracks between stones is the bed nitrifying bacteria. Also, of course, if it

Specialized is the nitrifying bacteria bed.Because the fish corpulent and food residual can produce the sodium nitrite deleterious substance, therefore can cultivate the nitrifying bacteria generally to come to transform it the younger brother nitration salt.Slit between the stone is the nitrifying

Professional is the bed nitrifying bacteria. As fish and food particles will have sodium nitrite of hazardous substances, so typically foster nitrifying bacteria to convert it into brother nitrification salt. Gaps between the stones is the bed nitrifying bacteria. Of course not only that, if it is a

Is nitrification bacteria for professional. As fish and food particles will have sodium nitrite of hazardous substances, so typically foster nitrifying bacteria to convert it into brother nitrification salt. Gaps between the stones is the bed nitrifying bacteria. Of course not only that, if it is a