public function actionCreate()
 {
     $model = new Pool();
     $pooltype = PoolType::find()->all();
     if ($model->load(Yii::$app->request->post())) {
         $model->capital_size = str_replace(',', "", $_POST['Pool']['capital_size']);
         $model->save();
         return $this->redirect(['index']);
     } else {
         return $this->render('create', ['type' => "create", 'model' => $model, 'pooltype' => $pooltype]);
     }
 }