Need help with my water Balance

[Bige]

UV I think is a take it or leave it but since you have it, use it. As a mod always says good bacteria don't float around so it will help. Do you have power heads? Are they pointed at top of water? Is your hood closed? I am asking because low 02 can cause low ph. If you have live sand then a ph of 7.6 is as low as it will go. The sand will go into solution and bring ph up(some). Then fall out of soluton. Stay on water changes. If you need to, do a pwc once a week till parmeters stabilize. I would say do more often but 500l is big.

[bavass]

9w is plenty with the other lights you have.

[basestring]

My hood is open and I'm using crusted coral instead of live sand.
and my power head is pointing around 10 degrees down.
it pointed more down before but my flower pot don't like to much stream.
is it better to point it more up?

how ever my 2 new JPN brown tanks are nipping it and I have to choose between them or my flower pot

I think I'll bring them back to the lfs. They told me that they would be fine with my anemones

sorry bit off topic

[CaptainAhab]

Your 500l works out to 130 gallons. At 300 watts of light (you don't say what type MH, CFL, PC, T5's etc) you don't have near enough light for an anemone or most any coral. IMO with that lighting you should stay in the FOWLR inhabitant style.

Bavass: The 9w is for the UV and is enclosed in the UV unit. It does not contribute to the lighting for the tank.

Your sulfur tube is most probably a sulfur denitrator... good thing to have.

The rocks sound like Texas holey rock but could be Figi or carrib rock.

Why are you dosing vodka?

Did you cycle the tank?

If I had to guess it would be that your tank is cycling with the fish in there. The 30% water changes are keeping most everyone alive. The corals and clam won't make it w/ those lights. With crushed coral and tap water you'll have a continuing battle with algae even with the denitrator and and UV.

Just MO

[basestring]

Thanks for the info.

My cabinet under the tank has some problems with the wood.
so the company that sold me the aquarium will give me a new one.
so I'll have to take everything out.

I'm thinking to change the crushed coral to live sand (grounded shells)
sorry that I don't know all the names

I'm not sure what kind of light it is. but it's very very bright!!!
it light bulb as it own transformer or something light that.

When I turn on the light, It will slowly get stronger and stronger
the shop told me that this light is good for anemones

I payed about 1500 Chinese yuan for the whole light system (around 220 usd)

I also did a water change (around 100 Liter) I checked the PH again and it dropped to 7.0 and is 7.0 for 2 days

is this dangerous??

My fish is doing well

the rest of the balance is acceptable, only NO3 is very high
that's why I'm dosing Vodka

and Yes my tank is not fully cycled and have lots of fish.
This is because I had to move my tank and had during that time a 90% water change

Water is now cycling for 2 weeks, and did 2 water changes during that time

[basestring]

Checked about the light. I have 2 x 150W MH light bulbs