Keith, the skimmer will help. A powerhead is a small pump that can be submerged in the tank. It can be easily hidden by LR and just generates extra water movement. Any LFS will sell them and the smallest one you can get will be best in the Orca.
Regular small water changes will help, but this kind of algae (very redish in colour) is due to the lack of 'flow' around your tank. You need to add a small power head and direct it at the problem area. These tanks are renowned for the lack of flow. As I said improve the flow and regular small water changes and things will revert to normal.
Your 'ex' LR will not become live again I am afraid. I would look to increase the amount of LR you have if you could and this will filter your tank accordingly this is the stage that you can remove your bio filtration, you will need to replace a fair amount of the dead rock with LR in a tank that size for it to be an effective filtration system.
Hey Swanny. You could have polyps, there are many gorgeous varieties, pulsing Xenia, carpet Xenia is also gorgeous and covers very well and mine has doubled in size since I got it, as the pulsing Xenia has also. Sun Corals are hard work mate, but well worth the effort, my specimen is far from the best I have ever seen, however after a lot of work and patience it now looks lovely when it is out. Mushrooms are also easy enough to keep and come in many colours and varieties (a nice example is the melon mushroom) all of the above mentioned will feed on liquid coral food,(except the sun coral)I feed liquid coral food approx every 2 days (about a tenner a bottle). My sun Coral was £18 and all of my other corals were approx £20 each (they are all a decent size and have all doubled in size also) Hope this helps mate. As you can see from my photos this leaves the tank pretty much stocked and still leaves room for growth.
NanoNewbie wrote: Recently caught the marine bug, have had an Orca TL450 for just over 2 weeks now. The tank has settled in well and water quality is good, with a couple of clown fish that seem to be thriving as are the cleaner shrimp, turbo snail and hermit crab. However already feeling restricted by the v.limited number of fish I will be able keep in the Orca (some say no more than 4?) so thinking of changing to a Red Sea Max instead which is just about twice the volume at 110 litres and seems like a good package for a newbie. Any advice would be welcome, just wondering if it is a bit soon to trade in but feeling frustrated looking at all the fish that I will never be able to have in the Orca.
Hiya NanoNewbie, welcome to FK. I know what you mean about the stocking level for the Orca, I have one and am fully stocked now, however I am enjoying watching it develop! I think the Red Sea Max is a fantastic starter tank too (I think they retail at about £600?) I have had a good look at one in my LFS, its very well designed. As Adam said, if your wallet (and other half) will allow then you could keep the Orca as well? This is my plan (when finances allow) although I want a bigger tank still! I will keep the orca and use it to propogate corals etc.