Good afternoon all,
I'm in urgent need of advice as I haven't come across this issue in am the years I have been keeping fish and it appears to be causing stress to my corals.
Here's a little info about my system.
Around 800 litres and set up for around a year.
1500 litre skimmer on 24/7.
Large refu gium with cheatomorph. Lit 18hours per day.
Good circulation and virtually zero algae in display.
50kg of walt Smith reef rock and pukani rubble in the sump. This rubble was pre soaked and water tested before introducing.
Sand is very fine. Conch turn it over nightly.
Parameters are as follows.
Temp 25.
Ph 8.2 stable
Kh 9
Mag 1230 manual powder dosing
Po4 0.5
Salinty 1.023
Nitrate 50+ppm
Everything was fine even with nitrate at 50ppm but corals started closing up and going pale when po4 dropped to 0.02ppm. I put this down to lack of po4 so began feeding a little more to raise it. Over a week the po4 has gone up to 0.2 then 0.5. Now the euphyllia are closing down!
It isn't easy to just do more water changes as the tank is so large.
Can any advise constructively on how to balance the two nutrients out without causing too much stress on the corals.
Tank is vastly stocked with zoa and palys. Some euphyllia, caulastrea, trachy and cataphyllia.
Help please!
Thanks in advance
I'm in urgent need of advice as I haven't come across this issue in am the years I have been keeping fish and it appears to be causing stress to my corals.
Here's a little info about my system.
Around 800 litres and set up for around a year.
1500 litre skimmer on 24/7.
Large refu gium with cheatomorph. Lit 18hours per day.
Good circulation and virtually zero algae in display.
50kg of walt Smith reef rock and pukani rubble in the sump. This rubble was pre soaked and water tested before introducing.
Sand is very fine. Conch turn it over nightly.
Parameters are as follows.
Temp 25.
Ph 8.2 stable
Kh 9
Mag 1230 manual powder dosing
Po4 0.5
Salinty 1.023
Nitrate 50+ppm
Everything was fine even with nitrate at 50ppm but corals started closing up and going pale when po4 dropped to 0.02ppm. I put this down to lack of po4 so began feeding a little more to raise it. Over a week the po4 has gone up to 0.2 then 0.5. Now the euphyllia are closing down!
It isn't easy to just do more water changes as the tank is so large.
Can any advise constructively on how to balance the two nutrients out without causing too much stress on the corals.
Tank is vastly stocked with zoa and palys. Some euphyllia, caulastrea, trachy and cataphyllia.
Help please!
Thanks in advance
