...till now I have been using
"Schultz-Instant" 10-15-10 product. But now my plant has been in flowering stage for 3 weeks already and I decided to buy something better for blooming.
Today I went to store hoping to get something for blooming.
I have read that a flowering plant wants food which is high in P (phosphorus) and K (potassium). According to this, the best what I found in that store was this product:
Substral 3:5:7 + microelements (for cactuses and succulents). Here's what is says: High-quality liquid mineral fertilizer for fertilizing the cactuses and succulents. It gives the optimal growth and development. It ensures the colorfulness of the leaves and flowers, and generous long-time flowering. ..which irritates me is that it says its for cactuses and succlulents. Is it relevant? 
Can I feed my plant with this? Guys, give me some help please. thank u very much ---------------------------- (a pic of my plant) 