water change question

[Amadod2]

I was thinking of switching from 30g every three weeks to 10-15g every two. I'm just not sure if 10 would be enough and If 15 would be too much on a 75g system that probably only has 65-70g of water overall

[tang daddy]

Originally Posted by Amadod2

I was thinking of switching from 30g every three weeks to 10-15g every two. I'm just not sure if 10 would be enough and If 15 would be too much on a 75g system that probably only has 65-70g of water overall

You have sand right?, looks like you run low nutrients so could probably get away with less wc.

[Amadod2]

I'm in a "testing" mode right now, i added 4 anthais last week, so my nutrients should go up. i do have sand and i gravel vac it once a month. I'm looking to add more fish