I have had a 29-gallon Biocube up and running since last October. One change I made to it was to use the Fluval Sea Marine and Reef 2.0 LED light. And another, at the advice of the LFS, was to get rid of the bioballs and replace it with Matrix, Phosguard, and Purigen. I used Dr. Tim's "One and Only Live Nitrifying Bacteria" to cycle the tank. I did NOT add anything live for about another month to ensure the cycle was complete. I started out with black live sand, about 25 gallons of ro/di water, salt from Petco, and about 40 pounds of dry rock from Amazon. Around the end of November/beginning of December, I added two Clownfish. After about a month one Clown died but the other is doing well. At this point, I now have about 7 or 8 very small coral frags-mostly zoas.
The major problem that I have is that I have algae. So much algae. Some of it looks like red bubble algae. There's algae all over the rocks, the glass, the coral, and some of the sand bed; not all red bubble algae, some is brown, green, and red with no bubbles. I think the dry rock that I got is where I started to go wrong. It was advertised as once having been live but I'm having my doubts now. It feels like it is made out of cement or plaster of paris and parts of the rock just seem to crumble apart and go all through the water everytime I move them. I was also uneducated about how dry rock should still be cured. One thing that I have tried with the red bubble algae is a hydrogen peroxide dip and scrubbing the algae off. This stops it for a few days but it comes back.
I'm thinking it would be best to get rid of the rock and get rock that I know is "real". I do have dead rock from a friend that has not been in water for at least six years. Would it be safe to put this in the tank in place of the rock I have now? Would it still need to be cured having been out of the water this long? Would it also be ok to replace the sand as well and is live sand really worth it? I had a concern about replacing the live rock and the sand and kickstarting another cycle but I have Matrix in the filter so I was hoping that would be enough bio media to prevent another cycle.
Sorry for the long post but I love my tank and I just have no idea what to do anymore to fix it. I really appreciate any guidance anyone could give.
The major problem that I have is that I have algae. So much algae. Some of it looks like red bubble algae. There's algae all over the rocks, the glass, the coral, and some of the sand bed; not all red bubble algae, some is brown, green, and red with no bubbles. I think the dry rock that I got is where I started to go wrong. It was advertised as once having been live but I'm having my doubts now. It feels like it is made out of cement or plaster of paris and parts of the rock just seem to crumble apart and go all through the water everytime I move them. I was also uneducated about how dry rock should still be cured. One thing that I have tried with the red bubble algae is a hydrogen peroxide dip and scrubbing the algae off. This stops it for a few days but it comes back.
I'm thinking it would be best to get rid of the rock and get rock that I know is "real". I do have dead rock from a friend that has not been in water for at least six years. Would it be safe to put this in the tank in place of the rock I have now? Would it still need to be cured having been out of the water this long? Would it also be ok to replace the sand as well and is live sand really worth it? I had a concern about replacing the live rock and the sand and kickstarting another cycle but I have Matrix in the filter so I was hoping that would be enough bio media to prevent another cycle.
Sorry for the long post but I love my tank and I just have no idea what to do anymore to fix it. I really appreciate any guidance anyone could give.



