Brown Slime after the Water Change

[dntx5b9]

So, I have decided to stop using tap water due to my unending green hair algae issue. I am in the process of purchasing a RO/DI unit. But in the meantime, I went to a grocery store last night, got some DI water and did a 20% water change last night. Now today, I am seeing brown slime looking algae (?) forming on the sand and my rocks. Does anyone have any idea what may be going on? Thanks!

 

[jwarcop]

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Maybe it wasn't truely DI water you purchased.. Probably had enough trace phosphates for the algae to show up.

 

[PatMayo]

Pictures would really help in this case. Did the water come from a machine or was it in prefilled jugs?

Regards,

Pat

 

[dntx5b9]

The water came from a machine. I got it from Wholefoods for 39 cents a gallon. As I said before, I have a severe green hair algae issue, but never seen brown slime (almost like red slime algae except it's brown) on the sand after the water change with tap water. I may do another 20% water change with the DI water tomorrow. Will see. But even if the water wasn't as pure as it should be, I know it has to be tons better than the tap water. So, I am confused ...