Nitrates:Phosphates - 4:1
I've got to correct myself here. If you are dosing KNO3 and KH2P04 the ratio is 4 parts KNO3 to 1parts KH2PO4. But the ratio of Nitrate to Phosphate is more like 10:1 like you said, or 10:2.
29 gallon, Fluval 306. Aquatop PF25-UV Power Filter, 1x39 watt T5HO 7" above tank. P.F. Sand, Pressurized CO2, 5 Glowlight Tetra's, 3 Halequin Rasborah's, 3 neons, 2 Oto's, 5 Cherry Shrimp, 4 Amano Shrimp.