Red Slime - Cyano
Hi,
my tank in the last month recently developed this red slime on the sand bed. phosphate is low based on my test and also i use the charcoal phosphate absorber. the alk level is at 7 so i think that's what's causing it. the question is how do i get rid of the red slime. when i do a water change, i syphon it off but it comes back. is there a good method for this?
thanx
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