dmolavi
Aquarium Advice Addict
A good HOB skimmer will run you around $150. You can get them for less, but they'll break down on you...
Doing water changes often. But that also adds up $. Saltwater is a lot more expensive compared freshwater. The fish are more expensive, corals can be lots of money. IMO if I am going to spend that much money on corals and fish, I want to make sure I can keep them alive. Because it stinks watching a $100 coral die (been there done that, makes you sick ) just start off real slow, take your time and when you do have the money get what you can.
You can use carbon in the filter but you will still need to keep the filter very clean. In freshwater they recommend NOT changing the filter pad because that os where the good bacteria is at. Well in saltwater you have to change the pad often (and that is more $)because that junk on the filter pad will cause your nitrates to go up
I dont think the carbon would remove enough toxins from the water alone. The live rock in the main tank should be enough surface area for beneficial bacteria so I dont think you would need any in the filter. I personally do not think it would be removing enough "junk" from the water.
With just the live rock and carbon I dont see how it will lower nitrates. Now if you decide to grow macroalgae in the refugium. That could lower nitrates but then again, you will need lights for them to grow. The filter isnt large enough to do a deep sand bed so that wont help you.
Also, if I modify the filter into a refugium and the weekly water changes, will I be able to keep corals?
With the right lights and water parameters in check you could