I'm having issues with algae, had dino and green hair algae so I'm considering switching my sand. Its probably 8 years old and I moved it from an old 55 gallon tank to my 90 gallon tank (shoulda just got all new!). So has anyone ever switched sand? Is it worth the trouble - does it stop the algae? Can I just pull out the old and put in the new or do I need to wait? Also should I leave some of the old there to "seed" the new sand and what about sand in the refugium? Thanks!
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