Question Where does the algae in new tanks come from?


loopy newbie
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So, I just started a new tank. In the past, I have used live rock. This time, I am using dry rock, live sand and using a commercial bacterial product to seed the tank.

My question is, where is the algae coming from given that probably only the live sand can contribute it? What about in tanks that uses dry everything to start with (plus commercial bacterial product)?

Is the algae we get in cycling new tanks the same algae that we see in the sea?

Just trying to understand things. Thanks!


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Manhattan Reefs
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Queens, NY
the live sand could have algae spores in it, the dry rock also, if it was used in the past.
Your water supply could also have it, which then becomes salt tolerant. probably more of a bacterial slime. The only way not to get it would be sterile conditions.