hello, all I have a one-year-old reef tank. about a month ago, the day after doing my bi-weekly water change, I noticed cyano on my sand. checked my NO3 and PO4; my NO3 is at 4 and my PO4 is at 0.00. I have a well-established pod population in the tank and I feed seaweed 2 times a day and frozen once. I was also dosing AB+ (25ml twice a week). I stopped dosing the AB+ and bought some more pods and microbacter 7 with the hopes of outcompeting the cyano but that hasn't worked. My PO4 is still at 0 and I think that this could be the root of my problem is there any way of rising it without dosing any chemicals into my tank, I don't like to add anything I don't need, which is the reason I haven't added chemi-clean.
Some other questions I had are :
Could this have been caused by the fact that I vacuumed my whole sand bed?
Will doing a 20% water change after dosing chemi-clean actually remove the medication in any way as 80% of the water is still there?
Will I be better off running carbon after using Chemi-clean?
The only filtration I have is filter socks, a skimmer, a carbon reactor, and a UV light. I feel like the UV should remove the cyano as it disappears every night only to come back when the lights turn on again.
Any ideas on how to solve this ?
Some other questions I had are :
Could this have been caused by the fact that I vacuumed my whole sand bed?
Will doing a 20% water change after dosing chemi-clean actually remove the medication in any way as 80% of the water is still there?
Will I be better off running carbon after using Chemi-clean?
The only filtration I have is filter socks, a skimmer, a carbon reactor, and a UV light. I feel like the UV should remove the cyano as it disappears every night only to come back when the lights turn on again.
Any ideas on how to solve this ?