i do water changes every 20 days
I guess everyone does things differently but I do a 12% PWC
every week. I might add that my calcium levels were still too low to promote coraline algae growth.
You MUST test for calcium & alkalinity to have an idea as what the levels actually
are. Water changes are good but you may not always get what you anticipated. I didn't.
I put 3 large pieces of lr
into my tank from the lfs
. They were 75% covered in deep purple coraline. After 1 month the coraline had not expanded to the other Fiji rock which was basically brown. I eventually ordered a few more test kits and found that despite my weekly PWC
's the calcium levels remained low. Two weeks after elevating my calcium & alkalinity levels and I have tiny pink dots forming everywhere. I can't wait to see what a month or two will bring.
I'd rather not dose my tank but for whatever reason it appears necessary. Next stop is the kalkwasser express.