No problem I dont mind the questions and opinions, that is what this hobbly and site are all about. My son is confined to a wheel chair and so the need for minimum clearances is needed to preclude damage of the cabinets and wall corners. so the size of the tank was determined based on available space considerations. Our move to the North coast 20 years ago was due to a need for a milder marine climate for our son also. So, with no restrictions on the equipment shed, there is where I have had a great amount of flexability for this system, but, Im afraid I have built the shed too small. lo. Anyway thanks for the comments and inquiries. all are welcomed. Currently Im plumbing in the Main protein skimmer Euro-Reef RC 250. Will be fed by a mag pump in the CPR cy-294 retrun chamber, I will put a bulkhead in low and feed to the skimmer and the return will be back to the cy-294 and gravity feed through the top back to the chamber. since the cy-294 has two chambers and two protein skimmers I will put some holes in the divider and also modify the divider to allow for the insertion of the bulkheat in the top. The return will slip into the bulk head so it can be removed if the top needs to come off for cleaning etc. all pumps to the protein skimmers will be independently switched so I have full control. Bout it for now. Pics soon.