DEEP BREATHS, Try to calm down. Looks like an outbreak of cyano
. Not a good thing and can be troublesome to get rid of.
1 Cut back on feeding. Cyano
like most problems comes from too many nutirents in the tank.
2 Siphon out as much as can from the substrate when you do a PWC
3 Try to get some additional flow on the substrate in those areas. A little bit of flow will help alot.
Quoting an old Lando post:
"Basically, it is the result of too much
nutrients in the water. Ussually it is a PO4
issue. The first step should be getting a PO4 test kit and testing both your aquarium water and the water you do top-offs and changes with (source water).
What is your souce water?
You have two goals here...
1) to identify and eliminate the souce of cycno and
2) get rid of the exsisitng cyno from your tank
You should begin doing water changes using high quality RO
water. You can try to vaccum up as much of the cyno as you can. Be careful not to break it up too much as it can spread. Check the age of your bulbs, as they get older they loose some spectrum and this can be a cause. Evalute your feeding and lighting schedules. Cut back on both. Add more flow to your tank. Cyno tends to get a hold in places of little or no water movement. Adding one or two more PH will help this. Chemi-! clean by Boyd Enterprises, INC is a great product. It will remove any exsisitng cyno from your tank but it will NOT keep it from coming back.
This is why it is so important to identify the cause of your outbreak. "
FYI, I used the Boyd's prodcut a few years ago. It will make the skimmer go nuts, so you need to shut that down for a bit if you use it.
Best bet is to find the source and eliminate it.