OK, let's go back a bit...
Clownfish DO NOT NEED an anemone. As stated, a frogspawn or similar coral will be great for hosting a clownfish. However, clown fish don't need anything. They will pick an area of the tank and stay mostly in that area.
My suggestion is 1) unless you know that an anemone is fragged from another already in captivity, or split from one in captivity, don't buy it; 2) unless you know exactly what #1 needs in terms of light, and care, and your tank can provide for it, don't buy it; 3) unless the person selling it knows the answers to #2, don't buy it.
LTA's can get BIG, over a foot wide given proper conditions. They can live for 30+ years in the ocean. These creatures do not belong in captive tanks.
You need a TDS
(total dissolved solids) meter (~ $20) to test your water. The meter should ideally read ZERO tds
. This is the water you use to fill the tank, all water changes and top off water. Top off water is not mixed with a salt mix. It is used to 'top off' the tank to make up for water lost due to evaporation. As water evaporates, the salt and other mineral concentrations increase. So it's important for tank stability to keep the same specific gravity (SG
) in a tank. To get 0 tds
water you need use a RODI
(reverse osmosis/ de-ionized) filter or distilled water.
You also need quality test kits to monitor the water.
Tap Water in Reef Aquaria
Reef Aquarium Water Parameters