hi everyone,got a silly question,what is silica sand? and is it a good substrate for l333's ? or is river sand ok.i currently have what i think is coral sand which looks good but im not sure wether to go with a new lot of coral sand or not,im worried about a ph shock if i change substrate but there are a billion snails in this substrate thats why i want to change it or should i just try to clean what ive got instead?
thanks
thanks
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