New tank to me- algae

[aceashburn]

I purchased this existing setup from someone 3 weeks ago. I kept the rock, sand, fish, frags, and about 20% of the water. I have added 10 days apart the 2 large pieces of rock on the left and right along with the snowflake eel and a cleanup crew of snails and hermit crabs. Since initial set up I have done 2 5gallon water changes. Over the last few days I have had a large acceleration of algae growing on the sand and the new rock I first added on the left. Is this normal? Something to be concerned with? Have I added rock too soon?
In my sump I have filter sock, foam (from old setup), protein skimmer and an 11 oz pack of chemi pure.
Ph is at 8.2. Ammonia 0. And nitrate 10ppm.

 

[Jekyl]

Using RODI water?

 

[aceashburn]

Yes I am using rodi water.

 

[Jekyl]

Most likely just signs of the new rocks leeching a little breaking themselves in. As long as parameters aren't going crazy probably nothing to stress about.

 

[aceashburn]

Great thanks for the thoughts. I do have the rock rinsed and then sitting in salt water the whole time before adding. But I am guessing thats a bit helpful but not the whole answer.

 

[Mical]

Probably a "mini-cycle" from using/disturbing old sand. Just keep an eye on params, you should be ok..