I have a year old mature reef tank, 90g. I have just purchased new MH lights and now feel confident to introduce an anemone. I am so keen to get it right. I do not intend to add another dead anemone to the list. So, I understand that one of the main problems is the anemone becoming absorbed by the PH intakes. I read that I should fit 'sponge prefilters for the PH's. Where can I get these sponges? I certainly have not spotted them at my local LFS. Should I expect to make up my own? Do they affect the power of the PH? Can you suggest any other ideas that will ensure success for the anemone that I wish to purchase?I will be interested to hear from you if you even suggest staying clear of anemones. With thanks, C J