Lionfish25

The temperature of the tank had been 28 or 29. But if I on the light for more than 4 hours it will raise to 30. However, what I did was on the light to see my fish almost every evening for 2 hours then I off the lights.

I got an old 4ft x 2ft x 2ft tank but was drained and add in salt and dechlorine water into the tank to cycle for marine. The end of 2nd week of cycling I washed No 3 marine sand and throw in. During these period, a Ehiem 4ft filter caniter was used to cycle the tank.the first fish put into the tank was the beginning of the 4th week. PH was 7 and Nitrate os 0.5mg as tested that time Everything was ok and 2 live fish was add in after one week. That was my butterflies. Followed by my sand shifting startfish got 2, and 2 hermit crab. PH was 8 and nitrate was nil. However everthing was still alive until the 6th week. I decided the water in the tank evaporate and dechlorine the water in a pail and add in the salt until the correct saltiness. I use my hydrometer to test the water in the pail before I pour into the tank. However sad to say all my fish die over night other than my demsal and 2 spotted groupers. PH 8 and nitrate is nil. Now I am thinking shall I drain everything out and take everything out, wash and start every cycle back to step 1. No point to buy anymore fish and keep guessing what's wrong with the water. I know is the water is not right and killed my fish, but I have no idea what happen.

Ok Thanks will monitor them. So the list of butterfly u posted is easier to take care? Cos I read and kind of confusing that should I get those u listed or not? Sorry newbie.

If u don't mind I can give u 2 blocks of live rock. I have excess and no idea how to get rid off. Maybe u can PM me for arrangements.

Can anyone help me to ID what fish is this? I thought is one fo the butterfly type bought. But I do not think so.

The butterfly I have

This is another pic.

After keeping for arowana for about 4 years finally decided to step into Marine tank. With the help of a friend I have 1 x 4ft canister filter and 1 x 2 ft canster filter. 1 x 4 ft blue and white light, sand bed, live rocks and some fake marine plants. Ideal tank wil be mainly on lionfish, butterfly and scorpion fish.

Sorry I am new here but why u put chinese lettuce in your tank? For your fish to eat? I just started my fish and live rocks only 4 ft tank.