Brew Green Water In A 2ft Tank Options

[sheringam]

Propose brew green water in 2ft tank project

1. 23.5" x 11.5" x 13" fiveplan brand tank
2. 51.81 litres of water (13.71 gallons of water), around 12.5" depth of water
3. 2ft DIY PL lights with 2 36W OSRAM tubes and e-ballast
4. Simple sponge filter to collect goldfish poos
5. Wooden air block for aeration
6. 2 4.5" to 6" ranchus

Is it possible to brew green water in 2ft tank rather than tub? I've all the equipment with me except the PL lights which I've yet to collect from a bro who help DIY PL lights. Will switch on the PL lights non-stop for 3-4 days or until the green water turn dark green?

[HappyBuddha]

Your setup is a very typical beginner's tank... so... better tell you what I know in case too many people follow it.

The main problem is the depth of the tank. PL lamp cannot penetrate that deep. With 2x36, at most you can have 6 inches of water. By the fifth day, the lamp already cannot penetrate beyond 1-2 inches!

Next, why is the a need for a sponge filter? Let the green water takes care of the poos. You risk cultivating BB if you don't wash the sponge with tap water to kill the bb on a weekly basis.

Does those wooden air-stone work in fresh water? I heard they don't. They're meant for marine tanks. A normal coarse stone works perfectly. Too fine a stone and erm... may be tricky to clear the clogged pores.

With only 6 inches of water (due to PL's limited penetration strength) .... you can at most keep one 2-3 inches baby goldfish. At 6 inches only... you're better getting one of those toyogo tub; easy to clean and cheap cheap too.